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The sound that arises when you step on a huge cockroach. It's technically the sound of the roach's skin breaking under the pressure of it's innards being forced outward by your shoe. This happens best with the huge (German) cockroaches you see on warm summer nights in the southern United States.
Person 1: Did you hear that?
Person 2: What?
Person 1: I stepped on that roach and it made a popping sound!
Person 2: Oh yeah that's roachpop.
by lukeamotion June 19, 2013
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