[did.dly-squat] n [prob. alter. of doodly-squat] (1974) slang: the least amount: anything at all "didn't know ~ about sports --Sam Toperoff"
DIDDLY-SQUAT
Meaning of DIDDLY-SQUAT in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012