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1 definition by Lissi

Verb, transitive.

Uncommon slang term meaning to engage in intercourse with someone.

Unlike "fuck", it is not usually substituted for anything else. One would not say, "That swivving bitch." It means, quite literally, having sex.
"Hey, open up!"
"Bugger off, we're swivving!"
by Lissi February 20, 2008