Definition of "diddly-shit" [diddly-shit]

• A small worthless amount (noun)

WordNet. Princeton University. 2010.

• "A more general google search brought up lots and lots and lots of biomed internships, but diddly-shit for psychology."
• "I don't really know to what an aversion to period sex is attributable, but I do know that it doesn't have diddly-shit to do with one's sexuality, so casting a man who doesn't like it as "gay" is just an unjustified smear against gay men."
• "Women marching in the streets never did diddly-shit for feminism."