Top Definition
A group of at least 9 well endowed males, preferably of hispanic decent, form a congo-like anal sex train creating a line. It is preffered not to attempt on humid and thunderous days. You should have at least one designated "spotter" becuase these events tend to go horribly wrong. Music is usually recommended listening to is Basshunter's Dota or Boten Anna for it livens the mood and creates more pleasurable anal sex experiance.
Man last weekend at my grandparents we had the most insane san francisco rail road, unfornately Nelson is still in the hospital.
by Panda Lover July 10, 2008

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The act of a man fucking a person doggy-style, while having a double ended dildo up his ass, and simultaneously fucking another person behind him with the opposite end of the dildo.
I was a runaway freight train on the San Francisco Railroad. My hips and ass hurt from all of the "chugging."
by Herbie VerSmelt April 23, 2013

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Lotsa space for your liquids.

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Your favorite word on a white mug.

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One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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The act of tucking one's penis between his legs and into is own anus. Then passing his own erect penis out of his asshole.
Daryl: Dude I tried the San Francisco Railroad last nigh, shit was so cash.

Eddie: Really? Wow...
by anonymoose16 August 05, 2009

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt