Someone who is closer to you than you are to yourself. A best friend beyond definition.
"What's your favorite color?"
Before I could even respond, my supertwin spoke for me.
by ptessodactyl November 20, 2009
Top Definition
super cool chick that loves the other twin for who they are. will never quit being super twins no matter what.

Love: "I love you too girrl, you're thee best"
by L0V3goes July 10, 2008
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