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Dirty-somethings are people (usually guys) in their thirties who show up at social events of age groups far below theirs own, often high school or college parties and gatherings.
- "Check out that dirty-something prowling the party for girls. What a sleaze"
- "Saturday night was fun, but who invited the dirty-three-year-old? He was creeping me out the whole night."
by Miles Backwards February 10, 2009
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