Darn diddly squat

A replacement for "damn"

Darn diddly squat I forgot how to take a bath, wanna show me how?

diddly dork

someone who is being cute and silly but stupid and weird at the same time

person 1: ur such a diddly dork
person 2: what the fuck does that mean

crud diddly

Crud diddly is a more PG way of saying the curse word "shit."

Cop: You're under arrest!
Me: What! I haven't done crud diddly!

diddly fiddler

(noun), a term used as an alternative word for sex, or someone who has a lot of sex

"wow! Kaden probably fiddles so many diddlies!"
"Dude, your such a diddly fiddler!"

diddly fucked up

Slang used in the Bad News, VA for "really messed up"

Aaron: My hair is all diddly fucked up.
Tripp: What even is that?
Aaron: You know