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1.
The residual warmth left over on a toilet seat after a man or woman has taken a crap, and or mearly sat there undressed for a period of time. The life force that sustains warm seat warriors.
When I sat down on the bowl I was pleasently surprised (disgustingley horrified) by the residual man heat left by my roommate.
by C.Devon Fox June 18, 2006
 
2.
a man on heat. pretty straight forward
boy, marks got real bad manheat today.
by ShitFace May 18, 2004