Son Goku's Saiyan name. The name is a pun on carrot, as is the name of his home planet Vegeta, (vegetable), if you notice, most saiyan names are puns on vegetables. Raditz = Radish, and so on.
Vegeta only refers to Son Goku as Kakarot because (or it as at least implied), that he doesn't recognize Goku has an earthling, because he was born saiyan, and he believes he should take pride in that fact, however Goku thinks otherwise, he wants nothing to do with the saiyans due to their violent and merciless nature, and prides himself on being raised an earthling.
A level of inebriation so extreme that one loses all attachment to reality and begins to genuinely believe that he is Kakarot (Goku) from Dragonball Z. Similarly all friends present are believed to be other characters from the Dragonball Z universe.
Cop 1: what does the breathalyzer say about his blood alcohol level?
Cop 2: IT'S OVER 9,000!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Cop 1: HE'S KAKAROT DRUNK!!!!!!!!!!!!!!!!!!!!!!!!!!!!
By Lucila
KAKAROT
it's when you literally go ape shit on a person, you take all of your soony anger out on that bitch ass motherfuckingdick sucking bitch