2 definitions by Anberlin

A girl who pretends to be a guy on the internet, because she doesn't get enough attention as a girl.
They normally pretend to be gay and say shit like "ZOMG j00 PWN LUFFLEH SPIFFEH LLAMA SPORKEH" (btw, that fad is OVER).
Me: That's a shim, bbycakez.
Shim: I ish not a shim I pwneth j00!
Me: Lawlshim.
by Anberlin March 18, 2007
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A penis that is the same size as your forearm, erect, from bottom of shaft to tip.

Is also equal to length of your foot.
Violet: So how big is Tom's dick?
Anber: He has a forearm penis!
by Anberlin March 8, 2012
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