doodly-squat

[ dood-lee-skwot ]

/ ˈdud liˌskwɒt /

a minimum amount or degree; the least bit (usually used in the negative): This coin collection isn't worth doodly-squat in today's market.

Also diddly-squat.

Origin of doodly-squat

probably euphemistic variant of doodly-shit, diddlyshit; see doodle¹, diddle², -y²

doodad, doodah, doodle, doodlebug, doodlesack, doodly-squat, doofus, doohan, doohickey, dook, dooket