noun

• One who or that which pops.
• (obsolete) A dagger.
• A short piece of twisted string tied to the end of a whip that creates the distinctive sound when the whip is thrown or cracked.
• (fishing) A floating lure designed to splash when the fishing line is twitched.
• Either of a pair of interlocking discs commonly used in place of buttons to fasten clothing, a snap fastener.
• A device that pops kernels of corn to produce popcorn.
• A stuffed and usually breaded jalapeño.
• A looner (balloon fetishist) who prefers to burst balloons.
• (informal, countable) A capsule of amyl nitrite, a recreational drug used during sex.
• (uncountable) Amyl nitrate.
• (Australia) Synonym of juice box
• A surname from German.