Top Definition
1. Noun: A little known state of matter in which one is both Heather and completely amazing. That is, a person, place, or thing which is unbelievably awesome.

2. Adjective: To be full of originality and coolness and a certain something that just wows people.
1. "Look at that Heatherocity, isn't she just the coolest person alive?"

2. "This band is so rockin, they're exuding Heatherocity!"
by Heatherocity July 24, 2009
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