As a noun numpty
is an idiot, dolt or fool.
As an adjective umpty is
being indefinite, unspecified.
numpty
English
Alternative forms
* numptie
Noun
(numpties)
(British, pejorative) An idiot, dolt or fool.
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umpty
English
Adjective
(-)
Being indefinite, unspecified
Derived terms
* umpteen
* umptillion