A play off the word "undead". While these energized corpses are neither dead nor alive, an unslut is a girl who is neither a slut nor chaste. She thinks and acts like she is a slut, yet lacks the physical features to actually arouse even the horniest, most hormonally driven men.
So this girl was all over me at the party, even though she had a boyfriend, which would've been fine except that I've had teeth fillings that have given me bigger erections. She was a huge unslut.
by Ihava Boifrend March 06, 2011
The opposite of a slut DUH!
Britney spears is not an unslut!
by Moo_E December 12, 2005

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