Top Definition
a name of irish orgin. Usually a girl with hilarious sense of humor. Nice to all but is her true self with her best friends. Also usually drop-dead gorgeous. This is a girl you would want as a friend.
"Did you meet that girl. Muireann"
"Yeh dude shes wicked cool"
by Audrey Johnson September 29, 2009
Communicates by meows, can be quite parannoying but makes up for this with her amazing culinary skills - coke floats, for example.

Is a noun for something so crazy that it renders you speechless.
Sam: There's a girl outside with no shoes drawing squirrels with chalk. I said hi, and she purred at me. What the fuck?

Ashley: It's pretty Muireann alright.
by Feawen March 31, 2009

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