Avatar: The Last Airbender/Memes

Avatar: The Last Airbender, a series so popular, it's no surprise that it has a huge number of memes that fans will be familiar with.
 * but then everything changed when the fire nation attacked.
 * "Cactus juice, it's the quenchiest!"
 * "IT'S A GIANT MUSHROOM! Maybe it's friendly!" and "Friendly mushroom! Mushy giant friend!"
 * "Yes! We have defeated you for all time! You will never rise from the ashes of your shame and humiliation!"
 * Prince Zuko: the Master Cockblocker.
 * "PENETRATING THE WALLS OF BA SING SE?!?"
 * "Thank you, the universe."
 * "My name is Katara of the Southern Water Tribe. You killed my mother. Prepare to die!"
 * From "The Ember Island Players", a Self-Parody of the series containing massive Flanderization and outright inaccuracies regarding the characters:
 * "HOOONNNOOOOOOOR!"
 * "Wait, did Jet just die?" "You know, it was really unclear."
 * "Avatar state, yip yip!"
 * "These memes are so good, they're making me tearbend!"
 * "Choose Treachery! It's more fun!"
 * "That... wasn't a good play." "I'll say." "No kidding." "Horrible." "You said it." "But the effects were decent."
 * Toph knows when you lie.
 * And she can hear you fap.
 * You got that right, twinkle-toes!
 * WANG FIRE! The supernatural embodiment of manliness and beards!
 * I AM MELON LORD! MUA-HA-HA-HA-HA!
 * I'd like to spend my vacation AT THE LIBRARY!
 * SECRET TUNNEL! SECRET TUNNEL! Through the mountain! SECRET, SECRET, SECRET, SECRET TUNNEL! Yeah!
 * Hey, I remember that line of the song! AND DIED....
 * Victory Is Boring.
 * MY CABBAGES!
 * Iroh just wants his cup of tea.
 * Creepy Katara
 * I laugh at gravity all the time. Haha! Gravity.
 * My first girlfriend turned into the moon...
 * That's rough, buddy.
 * Frothers, Foamy, Foaming At The Mouth Guy, Crazy Foaming Mouth Guy, Rabid Fanboy.
 * This one only pops up among the anime fanbase, with which the general Avatar fanbase has some crossover, but mentioning the series on an anime discussion board will generate numerous cries of "Anime ja nai!" ("Not an anime!") or links to Gundam ZZ's opening.
 * With the debut of the Promise comics comes the fandom's general confusion (and amusement) at Aang and Katara calling each other "sweetie." Some find it endearing, others, not so much. Either way, there's no shortage of jokes about it.
 * The Boulder. An obvious parody of The Rock.
 * Any crossover with Bender, for obvious reasons.