Top Definition
(noun): Used as an additional way to agree to a statement after someone has already stated "me neither"; used as an additional "me neither" when you are the third person to agree.
Mallory: I always enjoyed Paul McCartney's style, but I'm not crazy about the new look.
Daniel: Oh, me neither..
Emerald: Me threeither.
by LE831 March 15, 2008

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