pop·per I. \ˈpäpə(r)\noun (-s) Etymology:pop (I) + -er 1.: one that pops (as a firearm) 2. a.: a utensil for popping corn b.: a corn variety suitable for popping 3.: pop II 5a 4.: cracker 2b II. noun slang: a vial of amyl nitrite or butyl nitrite used illicitly as an inhalational aphrodisiac