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1.
A person you meet - usually via the internet - for the purposes of forming a repeatitive sexual relationship - not for the purposes of friendship. Less then a 'friends w/benefits', but more then a random hook up or one-night stand.
Sally met and spent the evening with Todd, her new sexquaintance she met from Craig's list.

When Sam isn't dating, he prefers liaisons with sexquaintances instead of hook ups.
by Saharajinni June 13, 2010