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intensely excited about something such that one's excitement rivals that of sexual pleasure
The release of Madden 2006 made Bob, an avid football gamer, happy in the pants.
by Nate910 April 18, 2006
1)being happy in the crotch area
2)having an erection causeing your pants to bulge
that chick makes me happy in the pants!
by dre dre August 21, 2004
something causing an orgasm or an erection.
Those cookies made Ben Davis happy in the pants.
by Emily and Brooke June 11, 2005