A shortened word that refers to teflon coated (and often steel core) ammunition which, at close range will penetrate vests, engine blocks, kevlar helmets, etc. Teflon, a fluorocarbon, is the acclaimed "slipperiest substance" in the world, which makes it an effective cop killer.
by Hoopnasty May 12, 2006
Get the teffsmug. "look at the girl with the breathtakingly attractive body so much so that it's almost dangerous..her name must be teff..."
by teff October 1, 2006
Get the teffmug. by Neched 1 & Neched 2 March 29, 2021
Get the teff nationmug. by Dayna Connelly May 27, 2007
Get the dub teffmug. W-TEFF!!
by MALKOVICH089 October 6, 2010
Get the w-teffmug. 
