The most intimate of kisses; The San Francisco Kiss is when two people rub their buttholes together passionately as if simulating kissing. Not to be mistaken with the San Francisco French Kiss.
Look at those two men over there locked in a passionate San Francisco kiss; What a time to be alive.
by WheelChair Dragon June 25, 2016
When two men touch their buttholes together.
Wow-wee Johnny sure gave me a great San Francisco Kiss last night!
by DonkeyBallsDonkeyBalls June 25, 2016
A noticeable dent in a car fender, bumper, or door acquired while parked, left by an anonymous San Francisco driver who drives away without leaving any contact note or insurance info.
Damn it! Some a*hole gave my car a San Francisco kiss on the right front fender while I was parked in the Stockton street garage!!!
by SF Tony December 05, 2008