nothing at all What does he know about the South? Diddly-squat!The lyrics in his songs aren't worth diddly-squat - it's the melodies that make you feel good.
diddly-squat
and (doodly-)squat (ˈdɪdliskwɑt and ˈdudliskwɑt)
n. nothing. (Folksy. Originally black or southern.) This contract isn’t worth diddly-squat.