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."
#shocker #idb #finger #swirl #spinner
von swirler 8. August 2009
5 Words related to three knuckle swirl
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