An instance where a substance is being smoked, whether it be cigarettes, cigars, hookah or illegal substances and a thick cloud of smoked being exhaled by another in a group happens to drift and blind another member of the group momentarily much like a thick fog on a rainy London morning
Fucking Mike took the biggest rip off of that hookah and it drifted into my face, gave me a bloody London Fog!
by Edger Winter June 30, 2009
To take a massive, stinky shit while someone is in the middle of a hot and steamy shower, thus creating an extremely unpleasant, thick, musty, and inesacapable shit smell throughout the bathroom.
by Jay Wilkins January 6, 2006
When your partner has an ice cube in their mouth and breaths cold air on you before performing cunnilingois
by Femmeword January 26, 2020
A fart in a steamy shower creating a fog like cloud that mimics the rainy and rancid city of London.
I was having a good morning till I accidentally gave myself a London Fog. Now my breakfast is coming back up.
by fartenthusiast December 25, 2020
by peepoweepo May 23, 2022
by birdman May 24, 2004
When a woman is preforming the art of "salad tossing" and one's self relieves himself by releasing an excrament of his own natural gas (farts) into her mouth. Usually preforming the London Fog Horn will leave the recipiant in an irate state of mind and has been know to lead to a violent reaction.
I was watching this porno when this dude gave this bitch the "London Fog Horn" and man did she get pissed off! Man that shit was funny!
by Billy Bingham November 9, 2006