A swamp turd is someone who is extremely lazy.
Carol: bob donât be such a swamp turd.
Bob: Oh Jesus Christ carol here we go agin.
Carol: well bob all you do is sit around and drink all day.
A swamp turd is someone who is slow mentally and physically
Carol: Bob your such a swamp turd.
Bob: Oh Jesus Christ carol here we go again. Just because I have toe fungus doesnât make me a swamp turd.
Carol:Bob your a swamp turd because you clench your butt cheeks when you run. Not because of your toe fungus
(Bobâs way of running is walking with a small skip)