The Culture/Excession

The fourth Culture novel, written by Iain M Banks. It concerns the reactions of individuals (mostly minds) of The Culture (and other interspacial species) to the discovery of an unknown and enigmatic artifact: The Excession.

Tropes used in The Culture/Excession include:

Anachronic Order
Appropriated Appellation: The Affront were called as such as criticism of their behavior, but they took it as a compliment and started calling themselves that.
Babies Make Everything Better: Subverted. Dajeil has been keeping an unborn baby in suspension for years, and she's the the cause of a fair amount of the Sleeper Service's drama.
Backup Twin:

The Killing Time: "Please accept my mind-state."

Badass: To borrow a phrase from another Culture novel, the Killing Time rips through an entire battle fleet like a berserk raptor plunged into a nest of kittens.
Boisterous Bruiser: The Affront, in a nutshell. Unfortunately, they're also all Complete Monsters.
Bunny Ears Lawyer: The Interesting Times gang. They're all eccentric, but they're not all Eccentric.
The Charmer: Byr - or arguably a Casanova.
The Chessmaster: The conspiracy's planners, very much.
Continuous Decompression: on Pittance.
Cool Ship: Most of the characters are ships, but the stand outs are the Sleeper Service and the Killing Time.
Death Seeker: The Killing Time, sort of, after its attempt at Heroic Sacrifice failed.
Didn't See That Coming: no one in the entire galaxy saw the Excession itself coming, and in particular no one even considered that the Eccentric Sleeper Service WAS BUILDING A WAR FLEET!
Driven to Suicide: Attitude Adjuster.
Exposition of Immortality: Drone Churt Lyne, who accompanies Ulver Seich on her travels is mentioned as having been a family friend for a milennia and parts of it's Mind dating back to ancient household computer programs from 9,000 years ago. The MSV Not Invented Here is also pretty old, Desert-class MSVs were among the original "large self-sustaining" ship designs the Culture came up with two milennia prior to the Idiran War, which itself took place 800 years before the events of Excession.
Face Palm: The Fate Amenable To Change, metaphorically.

If the Fate Amenable To Change had been a human, at this point, it would have looked down, put one hand over its eyes, and shaken its head.

Faster-Than-Light Travel
- Taken to a mind-bending degree. To get away from its official/unofficial stalker, one ship converts all its extra mass into one huge engine. By the end, the stalker is left asking itself, "Where is it going, ANDROMEDA?!?!"
  - Reaching somewhere in the vicinity of 230,000 times lightspeed.
- Keep in mind that this is a ship with an internal volume of over a hundred thousand cubic kilometers.
Fate Worse Than Death: Creatures genetically altered by the Affront.
- And what Grey Area does to organic creatures it doesn't like. Also crosses over with And I Must Scream.
For the Evulz: Affront culture. Every facet. A particularly vile example include the fact that one of the very first things the Affront did when they gained enough knowledge of genetic manipulation was to alter all their females so that they would only feel pain and fear during any vaguely sexual situation.
I Did What I Had to Do: The Attitude Adjuster.
Knight Templar: Grey Area. May cross over with either Complete Monster or Sociopathic Hero depending on your point of view.
Laughably Evil: The Affront, who are so innocently enthusiastic about their bloodthirsty viciousness that most higher civilisations that encounter them can't help but be amused. Not everyone appreciates the joke, though.
Macho Masochism: Affronters.
Male Pregnancy: Byr.
Mercy Kill: the Affronter Captain that committed suicide in a particularly painful way, rather than live with the shame of defeat, was put out of his misery by the Heavy Messing.
Mind Rape: The Grey Area. There is a reason the other Minds call it Meatfucker.
- Effectors are pretty much this when used as weaponry. The Attitude Adjuster is killed this way, being made to believe that it has crossed the Moral Event Horizon and forced to commit suicide.
More Dakka: Or at least the threat of it, is how the Sleeper Service prevents the impending war. As well as converting much of its mass to engines it has also spent its time as an Eccentric constructing more than 80,000 warships. These range from thousands of the smaller Thug and Gangster classes (which are still capable, individually, of killing planets) to 512 Abominator class capital ships (a single one of which curbstomped an entire battle group of warships far more advanced than those possessed by the Affront in milliseconds in Surface Detail).
Oh Crap: The Yawning Angel's reaction when it realizes the Sleeper Service converted all its internal volume into engine.

Two hundred and thirty-two thousand times the speed of light. Dear holy fucking shit.

- And then pretty much everybody when they see what the Sleeper Service has spent the rest of its time doing. See More Dakka above.
Obfuscating Insanity: The Sleeper Service; it's an SC ship pretending to be Eccentric.
Outside Context Villain: The Trope Namer based on the Outside Context Problem, aka the Excession itself.
Planet of Hats: The Affront, an entire race of cheerfully sociopathic Boisterous Bruisers. Deconstructed somewhat, in that they have exactly the sort of international standing one would expect given their behaviour.
Proud Warrior Race Guy: See Planet of Hats and Mercy Kill.
Punny Name: While all the Culture Minds have Meaningful Names, they also had double meanings to their names in this novel. Sleeper Service, Killing Time, Grey Area, the list goes on.
Really Gets Around: Byr.
Space Is Cold: Gestra's death.
Spikes of Villainy: Affront ships.
Techno Babble: A lot. They're Minds. It's expected.
Testosterone Poisoning: Affront culture. Every single aspect thereof.
Torture Technician: Grey Area. It actually carries a huge museum of torture devices, complete with demonstration videos. It's most efficiently painful device? A neural-lace. You know, that one thing that practically everyone in The Culture has.
Was It Really Worth It?: A crucial question.
Zero-Approval Gambit: What the Attitude Adjuster thought it would be doing.