Top Definition
Those persons between the age of 18 and 21. Legally, they don't exist, for they are neither a child, nor a fully matriculated adult. They can be drafted, they can go to jail as an adult, but they cannot check themselves into a hospital or drink alcohol.
Man, I hated being a tween and a teeny bopper, but now I am a tween adult and still can't do shit.
by Quido1 November 29, 2011
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