Bilson bomb

An enormous, unflushable turd. Named after a boarder called Bilson, notorious for blocking school toilets with his massive bowel movements.

Don't go into that dunny. Someone has left a Bilson bomb behind.

by boy on a bike March 15, 2009

Bison Bomb

When having sex,you flip your partners legs up over their head,until their feet touch the floor..and they are completely upside down. Then you give that vag a repetitive downward thrust with your man meat,and pound it into a pulp.

That bobblehead bitch Sandra came by this weekend. I gave that beav a proper bison bomb

by T999 July 18, 2019