Top Definition
A line of cocaine a prostitute takes off of a penis. (noun)

The act of a prostitute taking a line of cocaine off of a penis (verb)
Dude! the hooker over there says she'll have sex with me for only 5 bucks as long as I supply a proline, help me find a coke dealer.

Man, Vegas was nuts, I found this hot hooker who only charged me 50 dollars and before we went at it she made a line of coke down my cock and prolined it.
by pmpatton13 July 10, 2009

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