Random Words:
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Someone, who on an (open membership usually) online forum, steals a username of someone else and uses it pretending to be that person.
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What you say to someone who is either lying to you, bullshitting you, or doesn't know what they're talking about.
Another way..
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Vagina. Also known as snatch, girl-parts, cooter, hoo-hah, fanny, cooch, etc.
"Is itsy bitsy up to it tonight?"..