Top definition
sex
penis=jack, vagina=box
after the party i went over to jill's and we stayed up all night playing jack in the box
by jojo548 November 29, 2008
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2
Jacking Off
The Act Of Jacking Off While Think Of A Male Friend.
Kyle Was Playing Jack In The Box While Thinking Of Dave!
by Claudacious September 10, 2006
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