A fat ass yellow rat that is exceedingly overpowered. Also seems to be immortal as he has been with ash for 21 years. Baisically a yellow piece of shit.
Girl: Hey have you heared of pikachu
Boy: Oh that fat ass rat?
by S0f1a3a December 14, 2019
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This Pokémon is the result of using an electric stone on a ratata. This science experiment gone wrong has become the face of the Pokémon universe.
Look at that weird ratata, it's called a Pikachu.
by Cross.24 October 7, 2017
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1. A sexy little mouse that live in my garage.
2. A creature in Pokemon, used for beastiality, especially utilized by it's owner, Ash Ketchup.
3. A stuffed animal used by old men, especially recommended with viagra.
Pikachu! You are so horny today!1!
by Pikachu_Lova May 23, 2005
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A Pikachu is a girl who follows you around as if you were her Ash Ketchum. Pikachus are loyal and will stick with you no matter what, although they are hard to find, and generally harder to catch.

Even if you mess around with other pokemon, err... girls, pikachus will still stick by you. Pikachus are usually meek in public, but when drunk, the more electric side of their personality comes out.

Pikachus can get annoying because they're always tagging along and inviting themselves to things that you do, private or public. You might feel like you spend all the time with her, and your friends might not approve because it detracts from time that you would normally spend with them.

If you ask, pikachus will moan "pika pika" during sex ... if that's your thing.
Ben: I never get to see my big bro anymore because of his new girl.
Ralph: Yea, she's a pikachu.
Ben: I'm happy for him, but I wish I could hang out with him more often.
by Ralph Ralph January 10, 2011
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When you are anally penetrating a woman and she has a sneezing fit, so you jiz earlier
"My girl started pikachuing last night and it felt amazing
by Nando1888 March 1, 2015
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A bitch rat that butt fucks little people and chipmunks. The yellow coloration is due to its ability to urinate on its self. The red on its cheeks is from Ash, its trainer. Ash stabbed Pikachu there after pikachu tried to butt rape Ash. The butt ass ugly rat thing was stated to be eaten by Puff the weed dragon after Pikachu stuck its genitalia into Puff's anus.
Pikachu ran up to Puff and stuck its penis into the dragon's ass. Then, Puff took a dump on pikachu because he was high. Then Puff ate pikachu.

Ash butt raped pikachu after pikachu began humping ash's leg.
by Joe Shmoe Shwartz November 26, 2011
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1.(n)Pi-ka-chu A small hairy rat with a yellow tail and a weak bone structure from not drinking enough milk therefore not getting enough calcium.

2.(adj) electrically charged
3. (n) A type of rain that has been hit by lightning
1.The Pikachu only ate oreos and gummi worms
2.The Pikachu ballon caused the school to burn down from a fire started from strong electricity
3. The pikachu fell on the telephone wires causing a power outage
by Richard Jenkins Oxford February 23, 2007
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