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When playing in extreme sports or running. Or fucking for so long and hard that you begin to perspire on your derf. (space between your balls and asshole.)
Shit Sydney! You made me get derf sweat! But damn that pussy was good!
by tit fucker October 21, 2007
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Apr 26 Word of the Day
1. The default beliefs installed when you were a child.

2. An unexamined position you absorbed from your environment growing up.
I grew up in a conservative home so my factory settings lead me to vote Republican.
I grew up in a liberal home so my factory settings lead me to vote Democrat.
by riemannslost0 February 04, 2020
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