When someone drops a dookie SO huge or SO hard that it clogs the shitter - even multiple flushes won't "budge the fudge".
Joey ate so much pizza that he left a bowl-buster in there ! I'm gonna need a plunger and two pounds of C-4 to get that mutthafukka outta there !
by Painus inthe anus November 28, 2011
a much larger than normal bowel movement
Man, I must have lost 10 pounds after that bowlbuster!
by A.Nuss November 16, 2011