A unit of currency, worth a predicted £525m a week after brexit.
According to Boris Johnson, one Diddly Squat will be worth £525m per week after Brexit.
by Thrifty Amoeba September 3, 2018
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Teddy: Is my dick big?
Dan: No you diddly-squat.
Teddy: That was a joke. diddly-squat? Why the fuck can't you just be normal you brainless idiotic bonehead!
by CrustyBoyo666 August 1, 2020
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"I cannot do diddly squat without hearing all these leftists complain about something new every hour
by 91_Percent_Isopropyl June 21, 2018
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the equivelent of nothing; something that amounts to nothing
Vikings aint got jack diddly squat on ninjas!
by ninjamann13 June 5, 2007
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A word that was handcrafted and welded by the hands of Mcshlongs4u! It means anything.

It also means a very short person
Yo bro I can't see diddly squat

Bro look at that little diddly squat sitting on that bench!
by Mcshlongs4u July 23, 2023
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He talks a lot of smack about computers, but he actually knows squat diddly about operating systems or programming.
by Kolchak Jones March 9, 2017
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