I told her let's kick it, karate

from Justin Bieber (Ft. 2 Chainz, Asher Roth & Mac Miller) – Boyfriend (Remix) Lyrics on Rap Genius

Meaning

A play of words on the martial art of karate. To “kick it” means to chill or hang out. Karate is a form of martial arts, involving kicks, hence the punchline.

To help improve the meaning of these lyrics, visit “Boyfriend (Remix)” by Justin Bieber (Ft. 2 Chainz, Asher Roth & Mac Miller) Lyrics and leave a comment on the lyrics box