Let's get it
Nights like this, I'm a knight like this, sword in my hand, I fight like this
Kendrick uses a homophone of the words night and knight, again.
Sometimes he is like a knight because he uses his sword, or penis, to fight, or have sex with a girl.
Alternatively, his sword could be his pen; after all, “the pen is mightier than the sword.” In this sense, his fight is a lyrical battle, as opposed to sex.
To help improve the meaning of these lyrics, visit “Collard Greens” by ScHoolboy Q (Ft. Kendrick Lamar) Lyrics and leave a comment on the lyrics box