relative humidity 

The bead of sweat that rolls down your Sister's back when you're banging her doggie style.

The Relative Humidity was high during our Family Union

relative humidity by Anonymous September 18, 2003

relative humidity 

the sweat on your balls while fucking your cousin

At the family reunion, the relative humidity was all i could think about

relative humidity by CASEY CARMAN January 23, 2009

relative humidity 

It's that little drop of sweat that beads up on the back of your neck and dribbles down your back, thru your crack and eventually drips off of your ball while your fucking you sister.

relative humidity by Pat May 14, 2003

relative humidity 

The sweat that drips off your balls when you're caught fucking your cousin!

Last night I had some major relative humidity!

relative humidity by Nicole December 13, 2003

relative humidity 

The perspiration that forms between the shoulder blades of your first cousin, while you are fucking her in the ass.

Uncle Mike ... the relative humidity sure is high in your daughters bedroom.

relative humidity by maggotvommit April 17, 2004

relative humidity 

the saliva left on your genitals after your cousin gives you oral sex

Man last night my cousin trina came over to my house. I just thought we were gonna hang, then a few to many beers. Damn the ho was down on me! ie. relative humidity!

relative humidity by RD Machine January 11, 2007

relative humidity 

The sweat that drips from your balls onto your sister-in-law's chin.

relative humidity by Anonymous March 14, 2003