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Papap is an onomatopoeia referring to the sound of gunshots. It is usually accompanied by a hand gesture in the shape of a gun, rapidly thrusting up into the air and then down again. It is used at moments of excitement and thrills.
"Papapapapapapapapapapapapapapapap, bruv that was some sick shit!"
by Se LDN November 09, 2007