That's a jab, you should bob and weave

from Kendrick Lamar – H.O.C. Lyrics on Rap Genius

Meaning

He just hit you with a hard “punch"line thats why he says "jab” so you should bob and weave(boxing moves)

To help improve the meaning of these lyrics, visit “H.O.C.” by Kendrick Lamar Lyrics and leave a comment on the lyrics box