I know the heading says "proverbs" - but what the fella who started it seems to be after is cases where expressions arising from folk music (and sessions and so forth) are used or usable in the context of life in general.

For example "I can't seem to get in tune today."

(I liked the ambiguity in "This machine kills fascists" - it can mean it helps in the fight against fascists in the world, and also that it helps in the fight against fascism in the soul of the listener." Donovan's guitar just had "this machine kills." I rather suspect it started out as "kills fascists" but someone in the music industry thought that it might be too controversial, and censored it into total meaninglessness. I don't think Woody Guthrie would have put up with that. In fact I don't think Bob Dylan would either.)