A person(guy or girl) who thinks he or she is a gangster, because someone in their family( cousin, brother, father, etc) is part of a gang. This person is highly pathetic and brings shame upon their non-gang affiliated family members.
Here is the way you can tell if someone is a Relative Wangster.

1) He or she will act like they can beat up anyone no matter what gender they are( kind of like those girls who think and act like they can beat up any guy or girl)

2) He or she, when threatened, will say that they will get their *insert gang affiliated family member here* and that they will gang up on you

3) Finally, he or she will talk shit about people who have either already beat the crap out of them or someone who they have never fought before.
by TheTruth about People June 20, 2013
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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
by Anonymous September 18, 2003
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the sweat on your balls while fucking your cousin
At the family reunion, the relative humidity was all i could think about
by CASEY CARMAN January 23, 2009
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Can be used to tell/ask a person what you're/they're saying is the truth .

A different term for 'fo sho' and 'fo real'
Mike - 'Dude, Blink-182 are doing a Reunion Tour'

Jack - 'Fa Rel?'

Mike - 'Fa Rel'

Jack - 'Nice'
by MuhnkeyKnuts March 31, 2010
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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.
by Pat May 14, 2003
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The sweat that drips off your balls when you're caught fucking your cousin!
Last night I had some major relative humidity!
by Nicole December 14, 2003
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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.
by maggotvommit April 17, 2004
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