One of those folding lock blade knives with the little stud on the blade that allows a person to open it with only one hand. When modified so that it can be opened simply by a flick of the wrist(sometimes with some thumb pressure), it becomes a flip knife. In some states it's considered the same thing as a switchblade
Everbody knows T packs a flip knife, thats why the pigs are on him all the time.
by Wolf89 December 25, 2005