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1.
Pants designed for the female figure that add the illusion of an engorged penis upon sitting down.
I forgot why I never wear these pants until I sat down, now I remember they're transpants that make me look like I have a girl-boner.
by MomFatale February 27, 2012
 
2.
To transplant the items in one pair of pants (keys, wallet, change, belt, etc.) to a new pair of pants.
1. Damn! I've got mustard on these pants time for a Transpant.

2. Shit, where are my keys? Don't tell me I forgot to Transpant.
by flashwildecard April 18, 2011