A Pumpa slap is were you slap somone who either adding insult to injury you or jus annoys you, before you slap them say "IM GUNNA PUMPA SLAP YOU BLED"
dave : " hahaha, u failed ur exams"
phil : "IM GUNNA PUMPA SLAP YOU"

*SLAAAPPPP*
by PeRU.graff September 23, 2009
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