My X Is a Y

For any real person or character living in a society, having friends, relatives, class/workmates, love partner(s), vehicle(s), weapons or tools is standard (unles you're a Hikikomori), but in this case, said friend/relative/partner/tool has an unusual twist which most of the plot is based on.

Can overlap with A Boy and His X. See also The Joy of X. Use with care.

Examples of My X Is a Y include:

Standard My X is a Y

My Horse Is a Motorbike
An essay on people's attachment to Cell Phones called "My Phone is a Part of My Soul"
My Wife is a Gangster, the Korean trilogy of films.
My Wife Is a High School Girl
Okusama wa Mahou Shoujo (My Wife is a Magical Girl)
Magical Girlfriend - My S.O. is a supernatural being.
Boy Meets Ghoul - My S.O. is an undead monster
My Teacher Is an Alien
My Best Friend Is a Vampire
Bewitched: My Wife is a Witch
Charmed is "Siskoni on noita" in Finnish, standing for My Sister Is A Witch.
My Gym Partners a Monkey
True Lies: My Husband is a Spy
My Bride Is a Mermaid (in this case, the snowclone is only in the English translation, however.)
"My Dog is a Cat" by Dag Nasty
My Girl Is a Slut
My Stepmother Is An Alien
My Mom Is A Werewolf
The Boy Who Cried Werewolf: My sister is a werewolf.
My Girlfriend's A Geek (English title only)
My Parents Are Aliens
My Grandma is an Alien

My Other X is a Y

My Other Car Is an X is a subtrope.
- My Other Car is a TARDIS
- Team Fortress 2: The Sniper has a bumper sticker on his camper reading "my other car is a sword van".
- From a promotion for Halo ODST: "My Other Car is a Warthog". (See the license plate)
- Roosterteeth sells bumper stickers that say "My other car is a puma", parodying the above example from ODST.
- Futurama gives us "My Other Car Is a Porsche On The Moon".
Hot Topic sells wristbands that say "My other face has a mustache."
"My Other Phone Is A Boom Car" by They Might Be Giants
When Peter Griffin was turned sensitive towards women, he put a sticker at his car's bumper stating "My other penis is a vagina".