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 02, 2006
"look at the girl with the breathtakingly attractive body so much so that it's almost dangerous..her name must be teff..."
by teff September 29, 2006
by Neched 1 & Neched 2 March 29, 2021
by Dayna Connelly May 11, 2007
W-TEFF!!
by MALKOVICH089 October 06, 2010