Diddly Poo 

Something the New Orleans Saints didn't do offensively.

"We didn't do diddly poo offensively."
- Jim Mora

Diddly Poo by Nougatz January 20, 2009

Yee diddly 

A man named Mechanic that says this in the game Roblox Typical Colors 2

Could be used for positive interaction

Annihilator: THAT’S A MACHINE GUN GET DOWN!!!
Mechanic: Yee diddly.

Yee diddly by ThatsCrazyBro September 10, 2021

Now wait just a diddly darn minute 

Euphemism for "wait a minute" or "hold the phone." Typically used when one is experiencing an epiphany or life-altering escapade.

"Now wait just a diddly darn minute," said Vanessa after hearing the news about Harambe's murder.

Now wait just a diddly darn minute by K8theGr8est March 16, 2017

Diddlyhopper 

What a girl has between her legs. Not to be confused with dinglehopper, which is a penis.

Damn, Julia's diddlyhopper is tight as fuck!!

Diddlyhopper by Gigi Coker July 16, 2017

diddly squat

nothing

You know diddly squat about anything.

diddly squat by Anonymous June 16, 2003

diddly dick 

Something with absolutely no use or function.

Something that does not work.

These scissors don't do diddly dick!

diddly dick by AVGNfan May 31, 2009

diddlydarn

the funniest mother fcking word you will ever see EVER
the way it looks
the way it sounds
the only thing funnier than diddlydarn is jennifer lawrence

"now hold on just a diddlydarn minute"
"hey hannah"
"hey julie"
"diddl(ove)y(ou)darn"

diddlydarn by maxirons wife April 28, 2013