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1.
a person, thing, event, or trait that isn't plain old odd, it is downright weird.
My cheese sandwich looks just like your mother. What a weirdity!
by Vaughan Rowsell June 25, 2008
 
2.
Numerous strange people. Multiple weirdos. Plural of Weirdity.
Matt: Jesse and his sister behave so oddly, man! It's like the Addams family or something.

Lanter: Yeah, they are a pair of weirdities.
by Karait May 13, 2010