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Internal Pants Jizzage.
Example 1

Chopstixx: Hey Mark, have you given Weezy his IPJ for the day?
Solid: No not yet.... *bummed look*
Chopstixx: Well I can make anyone have an IPJ in this office.

Example 2

PowerG: Oh Oh OOoooohhhh !!!!!!
P-proper: wtf power?
Chopstixx: he must have had an IPJ
by P-Proper October 16, 2009