I function with you and you flaunt your pistol
The pistol works on two levels; its literal meaning and a metaphor for his friend’s ‘piece’. Kendrick’s saying that whenever he’s around, his friend is either threatening guys or hitting on girls.
Every time he is with his friend he starts trouble, pistol in Freudian terms may be a metaphor for a penis hence manhood, so his friend is constantly showing of trying to prove he is the most manly
To help improve the meaning of these lyrics, visit "Cut You Off (To Grow Closer)" by Kendrick Lamar Lyrics and leave a comment on the lyrics box