The theorem states that if a man witnesses the siting of tits, he must shit on at least one dick.

Converse: If a man has shit on a dick, therefore he obviously has seen tits.

Biconditional: A man will shit on a dick if and only if he has witnessed a pair of tits.
You know what the G-man says. If you see tits, you gotta shit on a dick!

The S on D theorem was on the test. But there was no dick to shit on!

Hey guys....I just saw tits. Would you mind?
by Shitondicks2212 February 27, 2011
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Abbreviation for "suck some dick." A euphemism for a gay male.
My boss isn't just a metrosexual; he likes to s some d.
by jeneverest123 February 8, 2010
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Blood on the Dance Floor's song "S my D" from the album "It's hard to be a Diamond in a Rhinestone World", stands for "Suck my Dick!"

(Which they cleverly disguise as "Solve my Dilemma" on some of their older youtube videos).

S my D is also a commonly used word for many highschool aged teens to tell a girl (or boy) to suck their dick in an undercover form.

Also used as a comeback.
Person 1: it's your turn to do the dishes. Person 2: S my D
by lazylupe May 17, 2011
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It's literal meaning is suck my d***, but also means f*** off, or back off.

A sign of defiance.
Hell no I'm not doing that! You can "s my d"!!

You could "s my d" before I do that.
by [D]bovee January 2, 2009
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a shortened version of the phrase "suck your dick."

see also: blowjob.
"It is customary on the third date for your lover to s your d."
by Aaron Little May 14, 2006
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