Top Definition
noun.

A socially inept and reclusive person who enjoys the company of instant message buddies and re-runs of "Home Improvemnet" over that of real-life human interaction.
Jake: Dude, the omca was out today, riding his bicycle.

Mindy: I don't believe you. He hasn't left his house since 1983.

Jake: Well, I did just have my eyes dilated, leaving me with blurred vision, so, you're probably right.
by greg* January 29, 2009
5 Words related to omca

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