Top Definition
It is a variation of the Italian slang word, Mahdon. Mahdone meaning (Holy Shit usually in a good way) Donmah means holy shit in a BAD way... Like when looking a a really ugly girl or or guy say DONMAH! You would use MAHDON if they were hot!
DONMAH! Look at that beast, not in a million years!
by David February 07, 2005

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