San Francisco semen surprise 

To jerk off, off the side of the golden gate bridge. Extra points if you hit Alcatraz.

Thala: where the hell were you?
Michael: giving big red the San Francisco semen surprise!!!!

San Francisco semen surprise by righteousconsumption October 20, 2014

San Francisco Christmas tree 

A four-person minimum gymnastic homosexual feat of strength, endurance, and simultaneous load blowing and collapse. A vertical structure of two human centipedes zipped together at the penii (see docking) that come together when the top two participants kiss to form the pinnacle of the tree.

Eric blew out his ACL because he thought he was strong enough to be the base of a San Francisco Christmas tree.

San Francisco Christmas tree by ForearmDeep November 8, 2019

san francisco yes 

Always super-enthusiastically agreeing to plans and always, always flaking.

"Hey John, do you want to come to my daughter's wedding?"
"Yes, absolutely! I've been waiting for you to ask!"
***
Day of wedding, via text: "I can't make it, my dog is sick with the measles :-( Next time though!"
That's a San Francisco Yes.

san francisco yes by Hebejebelus July 20, 2016

san francisco left 

While driving, the act of passing the street you wish to turn left on, followed by 3 rights.

To make a San Francisco left on 19th Ave at Geary, make a right on 20th, a right on Clement, and then a right on 19th.

san francisco left by George Burnett March 22, 2007

San Francisco St. Bernard 

Homeless people who defacate on the street in the middle of the night leaving large piles which must be minded else those new Bruno Maglis or that fresh petticure won't be that new or fresh.

Newbie: I really love this new job, but walking here from the ferry, I surprised how many St. Bernards there are in the city and how few of their owners clean up after them.

Veteran: San Francisco St. Bernards? No, that's just homeless output.

San Francisco St. Bernard by Alfetta159 December 14, 2010

San Francisco Supreme 

A person who is homeless, gay, transgender, vegan, cruelty free, democrat, autistic, pansexual, pro-abortionist, high, and drink that is causing a major disturbance in the San Francisco Bay Area.

I was walking through airport security and found a “San Francisco Supreme” beating up the Rent-A-Cop.

San Francisco Supreme by DAL204 November 28, 2019

San Francisco Steam Train

An orgy of gay men who create a conga line and fuck each other from behind simultaneously. An anal chain gang, popularized in San Francisco.

Girlfriend, my ass is still hurting from the awesome San Francisco Steam Train we had last night.

San Francisco Steam Train by Mr Swipe August 19, 2007