(v.) doing exercises, often
crunches or push ups, before sex in order to look
marginally more fit; to do a warm up routine in
preparation for raucous sex.
Girl 1- "Isn't Mike
coming over?"
Girl 2- "Yeah!"
Girl 1- "Then why are you doing
crunches?"
Girl 2- "I'm just limbering for timbering.
It's gonna get rough tonight, plus I want to burn some flab."