A generic, and very vague way to answer a question with a great lack of enthusiasm. Commonly used after one has completed a task and is devastatingly bored, hence currently doing absolutely nothing or diddly shit.
Slim Johnson: "Hey Dick what have you been up to lately?"
Richard Head: "Well Slim... as of lately... diddly shit."
by Tight Chambers June 18, 2013
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the act of doing nothing in a weird fashion
Noah, Brent, Amanda, Christa, and Josh were diddly-farting around today in the food court.
by acds February 15, 2012
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A term used when you are surprised, intrigued, ashamed or angry.
"Ella pissed me off today, lordy fucking diddly."

"Lordy diddly you shat me up"

"I missed eastenders, lordy diddly"
by Angelique Junior January 5, 2019
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Homer: Hey Flanders, your house is on fire!
Ned: Oh-- for crying out-- son of a diddly!
by dedweesel January 28, 2003
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The ultimate bro. Commonly used to refer to a close friend or pet.
"Bro Diddly, did you seriously just merc on my eggroll?"
by kyler serfass May 10, 2007
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