Top Definition
A term that can only be used in the same sentence as the most digusting of sluts. She is a literal cum dumpster if she can get past filthy fifths...

Just think about the term for a moment...Nasty nineteenths. Thats fucking gross. Even sloppy seconds is pretty groady.
Mike: bang Jenny last week?
Devon: I was her filthy fifth. What were you?
Mike: Her nasty nineteenth!
Devon: ...that's not something to be proud of.
Mike: I know. I've got herpes, gonorrhea, crabs...
Devon: Oh...sorry dude.
Mike: Hmm? It's not your fault.
Devon: She was clean before I got her...
Mike: Nasty Nineteenths are gross now...
by MoRPHiNe April 14, 2008
5 Words related to Nasty Nineteenths

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