This isn't a lyric exactly, but I seem to recall it from listening to one of my many recordings, the line in full is (censored) "He's a mighty sharp n-gger, but he can't fool me!"

It's been an earworm for me for a number of years. I want to say that it was Uncle Dave Macon, but I may be mistaken, of course. I'm just trying to find a song to get rid of that worm.

Thank you for any potential assistance!

Kegan