Top definition
the science that deals with the matter, energy, motion, and force of penises during sexual intercourse
Jim: "My friend told me he did sixty-nine with his girlfriend on the bottom. I told him it would benefit him if she were on the top, therefore she could have a full range of motion to suck his cock.

Joe: "I agree. That's pretty basic dick physics."
by borntobustass September 23, 2010
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