Top Definition
an intricate oral sex move performed on a man where, while giving an already incredible blow job, the girl gently twists her hands in a kind of corkscrew motion and also swirls her tongue around the head of his cock.

originating in the dorms of a philadelphia university and with all the twisting and swirling, the name "philly swirl" was only fitting.
"hey girl, what'd you do last night?"

"i gave my boyfriend an amazing philly swirl and he busted all over my face."
by mrs. sex master 3000 September 14, 2008

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