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1.
An absolute requirement when walking around San Francisco.

Opposite of gaydar
Straightdar detects no straightness in the area. User be wary of anus exposure.
by newyorkcitynewyorkstate January 07, 2007
17 9
 
2.
the ability to sense if someone is heterosexual.
Bill- "Dude, my straightdar is tingling over that guy you were talking about."

Chris- "Damn it, man. I was definitely going to go hit on his cute ass."
by Ladron June 24, 2010
5 0