1 definition by legatusmortis

The notion that, when a woman (or man, depending on how you swing) has given you a blow job, and then has kissed you at some point in the future, you have then, by transmission, had your dick in your mouth. This also applies to when it was someone else's dick being sucked, and then transferred to you in the act of kissing the one who had sucked dick.
A sucks B's dick, then A procedes to make out with B. therefore, B, through transitive property, had its own dick in his mouth.

A sucks B's dick, then later makes out with C. therefore, C has had B's dick in its mouth
by legatusmortis September 1, 2010
Get the transitive property mug.