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1.
The official battlecry of the pokemon pikachu.

Ash: Go get 'em, Pikachu!
Pikachu: Pika-pika! ..piiiiikaaaaaaachuuuuuuuuuuuuuuuuuu!!
Team rocket: Team Rocket's blasting off agaaaaaaiiiiin! *sparkle*

by vampirebug94 August 17, 2007
 
2.
1. cold-climate lagomorphs, relative to rabbits and hares, that have short ears, almost no tail, nostrils that can close at will, short limbs, and long, dense fur (even the feet are furred)

2. what pikachu says
1. rocky mountain pika, cony
2. PIKAAA!
by Aliz February 01, 2005
 
3.
The icelandic term for vagina
I slipped my hand down her pants to feel her moist pika
by the413 August 20, 2009
 
4.
PIKA is a chat group on the Neopets Avatar Chat devoted to Pokémon; Pokémon Is Kick (Butt)!

Members chose a Pokémon to "be" upon joining

PIKA was created on Halloween of 2009.
PIKA has balls... POKEBALLS!!!
by PIKAer January 10, 2010
 
5.
Pika is the worldest sickest cunt. shes also really hot and loves food. coolest kid in town and doesn't give 2 fucks about anyone. sometimes you will see pika stealing taxis, jumping off building and being bad-ass. nicki minaj and Justin beiber are one of pikas best friends. pika also has a lot of hot friends which are known are drivers. a pika is usually undercover but you can tell if someone is a pika if:
1. their name is pika

2. they are extremely cool and swag
3. if they are attractive
5. if they're rebellious
6. if they go to Disney channels website WITHOUT their parents permission
Mel: WOW WHOS THAT

Lucy: I THINK THATS PIKA
Ash: YEP THATS HER
Gemma: NO ONE ELSE CAN BE SO COOL
Sophie: AND SWAG
Lewis: ILL GO TALK TO HER BEFORE THE SWAG LEVELS GET TOO HIGH
by swagpolice101 August 23, 2014
 
6.
An exclusive group of girls, ladies, gals, women. It is used as a noun. Most everyone envys them and every guy wants to be with them whether for a night or for a lifetime. These girls know how to have fun and are so cool.
Everyone wants to be a pika.
by Pika1 February 02, 2014
 
7.
A fail forum troll
a person who likes to make videos about himself and a game
someone who only goes on forums to make people mad or to get atttention
Pika's also like to where adidas
all around fag
Pika loves cock
by Penisman228 December 19, 2010