a greating like hello, that can be used with friend or foe, when knowing the person's name or even when you don't (funnier if you don't)
person one: here comes that fag. i can't rememeber his name.
person two: hey guys!
person one: sup dick?
by Dalton April 21, 2005
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(noun) 1. When your penis is erect, and you flex it upward in a sup nod to your partner.
“She was surprised to see me naked, so I gave her the sup-dick to break the awkward silence.”
by Supdickman September 19, 2019
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