Alternative and slightly more racist version of wank/maturbate. Refers to the shape of the opening of the penis...too much detail?
Phwoar I'm gagging I need a japp!

Mother of Sin! Your fit...fancy giving us a japps?
by avenger of the idiots February 11, 2005
1 more definition
Top Definition
To respond in the affirmative.
Most commonly used twice in the same expression.
"Do you think Rosie O'Donnell is a fugly mole?"
"Japp Japp!"

"Are you going out tonight?"
"Japp Japp!"
by Oodica May 11, 2006

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