noun Slang.

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.

Origin of doodly-squat

probably euphemistic variant of doodly-shit, diddlyshit; see doodle1, diddle2, -y2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for doodly-squat

squat, shred, jack, naught, whit, iota, nada, diddly-squat, ounce, anything