Top Definition
Irish name: "done + acka" donn "brown" and cath "battle" meaning "brown-haired warrior."

Adjective to modify the noun "film" to describe one that features singing and/or dancing/ black&white grainy arty look/ ambiguous morality tales/ Stellan Skarsgård
"What are you watching?"

"A Donnacha film"

"Oh, I'll watch Bloodsport in the back room then"
by notdonnacha February 02, 2010
A person who gets used for various things like parties.Also someone who Suffers from body odour and takes advantage of the opposite sex whilst they are sleeping/unconscious.
He stinks!

I know he's such a Donnacha
by Brown lord December 05, 2011
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