It is the saying meaning that marijuana comes before any female or "Pussy". Related to the saying Bros before hoes.
Dude1: Hey man want to hit this man!?
Dude2: No man i gotta go hit up my girl.
Dude1: Yo man Blunt before Cunt!
Dude2: No man i gotta go hit up my girl.
Dude1: Yo man Blunt before Cunt!
by BigBadNasty October 6, 2011
Get the Blunt before Cunt mug.