diddly diddly diddly 

Ah yes. Diddly diddly diddly. "That's called cow tipping, ha. Ha. Ha." Diddly diddly diddly is a nerd word from back at the barnyard.

DUDE I GOY AN ARM!

COOOL!

AH DIDDLY DIDDLY DIDDLY!!

diddly diddly diddly by Vivibicker August 24, 2017

Diddly diddly 

Goodbye or good morrow

Dearest friend,
(Body of letter)
Diddly diddly,
Kyle

Diddly diddly by Diddlydiddly March 18, 2021

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

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