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1.
to express discontent and irritation by exaggerated emotions such as shouting, flailing of body parts, or use of disrespectful remarks. (Sometimes used as a phrase "japping out")
My mother japped out when I arrived home extremely late from a party.
by Sharice November 22, 2003
 
2.
to act as if you were someone from Japan, to act Japanese. Used and created by WatchMinister.
"Damnit, edited, stop japping around."
by Q-A July 26, 2003
 
3.
A new horrific craze sweeping the nation from small children to German underground bondage sex shows. What be this sickness I hear you ask. It's the painful and unholy act of shoving objects (dildo's if you will) down one's jap eye.

It is in no way recomended and will leave lasting damage both physical and psychological.
"See that tree branch? I'll bet that makes for some good japping!"

"Sorry I didn't answer the phone Tom, I was too busy japping one.. pencil's are sharp."
by Alex J J July 10, 2006