Very little, in slang

• The least amount
• FA team in pub, possibly swapping tips!
• Nothing much, to weightlifters?
• Exercise that's not worth much?
• Nearly none, in slang
• Least amount
• Worthless amount

Wiktionary Word definitions in Wiktionary
n. (alternative form of diddly-squat English)

WordNet Word definitions in WordNet
n. a small worthless amount; "you don't know jack" [syn: jack , diddly-squat , diddly-shit , diddlyshit , diddly , diddley , squat , shit ]