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Plural form of the word geis. A magic taboo in irish mythology, usually bestowed by women upon men (or by a goddess). Brings power if obeyed, and dishonour and even death if disobeyed. Just your average women talk, then. The welsh equivallent is tynged.
Dude, when my girlfriend talks its like geasa, you can't argue.

Man, you are so nerdy
by Pelao824 December 16, 2013
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