The underlying ability that a mans' penis has to point out one or several really hot women in a crowd of people, as if by radar.
Dude! my penisdar is going crazy! she MUST be nearby!..
by Latelate1234 January 02, 2010
9 Words related to Penisdar
A person's ability to calculate a male's penis size based on achievements, attitude and swagger.
- "Did you see the Dylan Sprouse nudes?"
- "Yeah man! I expected more. My penisdar was telling me atleast 6 inches but I was off!"
by Key Meioh December 15, 2013

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