Top Definition
Sexual act, where by the "giver" takes 3 inches with the first mouthful, 4 inches with the second mouthful and 5 inches with the third mouthful. This process is repeated to ejactulation.

6, 8, 10 is possible but only after stretching.

similar to a standard blowjob.
I was in the Mathematics department at Imperial and THE girl in third year, I forget her name, gave me a Pythagorean Blowjob. I'm afraid I reached the identity after five cycles.
by Genius92 November 04, 2011
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