when someone is laughing so fuckin hard they start to puking blood. its not that their literally puking out blood, its just a way of describing how hard theyre fuckin laughing
Danny:mother fucker,that senior citizen just got hit over the head with a baseball bat!

Nick:wtf thats fuckin hilarious PBPB(puking blood puking blood)
by danny August 20, 2004
Get the puking blood mug.