did·dly–squat 
/ˈdɪdl̟iˌskwɑ:t/ noun
/ˈdɪdl̟iˌskwɑ:t/ noun [noncount] US slang : the least amount : anything at all
▪ You don't know diddly-squat about sports. ▪ He loved his job even though it didn't pay diddly-squat.
▪ You don't know diddly-squat about sports. ▪ He loved his job even though it didn't pay diddly-squat.
