I couldn't find this in the DT, or the forum, but maybe the search isn't working, or maybe I'm not working.
There are several songs called Slipknot. However, this is the Woody Guthrie Slipknot (Hangknot, Slipknot), or at least the version I have of it.
Oh, did you ever see a man tie a slip knot, (2x) Well I've seen it many a time, Lord, he winds and he winds After thirteen times he's got him a slip knot.
Tell me will that slip knot slip, not it will not (2x) Oh my brother was a slave, lord, he tried to escape They left him there to rot on that slip knot
Tell me who makes the laws of that slip knot (2x) Tell me who, yes, who is going down to the calaboose To help that hangman string up that slip knot
I don't know who makes the laws of that slip knot (2x) But the bones of many a man are whistling in the wind Because we make our laws by that slip knot Because we tie our laws by that slip knot.