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A US deep south term for an alligator. Usually used in the Cajun dialect.
Take the big pirogue, I saw a huge swamp dog out there earlier.
by Crystal Ambrose May 12, 2006
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Similar to swamp donk; but a legitimate term on its own and one that is easier to say.

Refers to a female or male (though the term is typically applied to chicks) who at one time might have been 'clean' (i.e., a dog) but that has now become dirty, annoying and untouchable (because it plays in swamps).

My neighbour Lauren is a swamp dog. She puked on my floor and plugged up my toilet too.
by Gaede May 31, 2008
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(adj) A cosmedically challeneged person.
Dam dude, she was a swamp dog
by cacee July 12, 2005
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One who is so crazy wierd that they seem to creep instead of walking, or laugh instead of talking, who, if aproached you and asked where a member of your family was, would make you want to run away and take a shower. The creepiest of land mammals, the dirtiest of men.
Dave: Man, that Beatty kid is a real swamp dog, creepin' round an' such.
Mike: Shit, I'm goin' home.
by DCMizzle April 17, 2007
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