To accidentally exhale when taking a hit from a bong or marijuana pipe, causing the weed to fly out of the device.
Dude, you biffed it! Now we gotta pack it again and there's a burn mark in the carpet. Good one, asshole!
by John October 12, 2003
Get the Biffmug. Derogatory term for a practitioner of Brazilian Jiu Jitsu / Submission Wrestling who relies on brute strength rather than technique or uses dirty tactics to achieve victory. (n)
"Man, I just sparred that new guy in the black gi and he nearly tore my fucking ear off, what a biff!"
by monkey puzzle January 10, 2010
Get the Biffmug. dude rollercoaster tycoon is so biff
by Luke rfdshgfdjhhgjk March 15, 2008
Get the Biffmug. by Bonogal August 3, 2008
Get the Biffmug. by narmasmith October 9, 2008
Get the Biffmug. by <<INIT>> January 2, 2009
Get the Biffmug. by Is very moody May 11, 2010
Get the biffmug.