1 definition by mynamejose

Undy - Undies is a slang term in England for someone got stabbed or messed up tille they spilled blood in any way,
This is because just like underwear gets stains on it all the time, that person now has stains all over them.
I dib that guy in the chest, now hes like undy. Stains all over em bruv.
by mynamejose June 6, 2021
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