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1. T string
Looks like a G string, but backwards.
Either you've got a really horrible camel toe, or you've got on a T string.
2. t string
Most commonly known as the g string. The type of underwear known as a g string but should be called t string due to the t shape at the back at the start of your butt crack.
Her t string was showing, I could tell because it appeared she had a t in her butt crack.
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