Top Definition
The act of not being able to get an erection while with a hot girl.
Gavin: So did they have sex?
Tariq: Nah man. Someone said he was pulling a Thaddy, again.

Girl 1: Was he good in bed?
Girl 2: I wouldn't know, he pulled a Thaddy.

Kevin: I heard he was pissed after she left because he pulled another Thaddy.
Luke: Sucks to be him
by vseline May 01, 2011
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