Top Definition
Mid-coitus, getting your finger, generally the middle one, three knuckles deep in her ass and giving a little spin, or "swirl."

Usually done as a complete surprise.
"I gave her the old three knuckle swirl, she fucking loved it!"

"I tried the three knuckle swirl on her, she wasn't having it."
av swirler 8. august 2009
5 Words related to three knuckle swirl

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