Top Definition
A Backdoor Typhoon is a glorious sex act, in which you fuck a woman in the ass while giving her a swirly.
Dave: yo Dawg, how was that dank partay last night?
Chris: it was Gnarly, I gave Cheryl a backdoor typhoon. I think she hates me now
Dave: SOOOOO SOLID!
by CarpetFucker April 15, 2014

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