jack squat, diddley squat got together one night and fell into a black hole===the result they *really* came up with nothing!

Even less than nothing, voidier than empty
I didn't to jack diddley last night cause I had squat for brains
by flippytale January 16, 2004
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The sound indicating the presence of a doodle-smacking monster on doodle jump, used to a) warn someone else of an approaching problem b) take the piss out of an authority.
a) Chick One: Hey Gloreen, you get my homework done?
(Teacher comes into view behind Chick One's back)
Chick Two: Diddley-rum.

b) Slacker One: Manager's coming.
Slackers Two, Three and Four: Rum-diddley-rum-diddley-rum.
by grnlk May 19, 2010
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Part of the Dudar-Cressy vocabulary, 'bo diddley' is a word that comes between flash and sea shanty, meaning 'okay' - not too cool, but not too uncool, either.
I guess that shirt is bo diddley.
That movie was definitely not flash. But... it was bo diddley.
by Sailor V October 27, 2005
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Giving full anal satisfaction. Licking a womans ass prior to intercourse.
I would give her the Hoe Bum Diddley
by Piss Pot Pete September 24, 2008
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How Homer bad mouths his neighborino, Ned Flanders.
You suck-diddley-uck Flanders!!!
by dlogcher July 11, 2006
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An extreme insult that should never be used.
Him: You diddley darn doofus!!
Me: .....YOU UNCULTURED SWINE!!!
by I did this in the middle of cl February 11, 2019
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the act of purposefully vomiting onto a girls vagina
"yeah that girl is a freak, she asked me to do the Bo Diddley"
by jeremiah thompson February 8, 2008
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