You London Speak Best 

This phrase is used when person A makes a grammatical error which then person B would reply with “You London Speak Best?” sarcastically.

John: I liking this soup.
Jill: You london speak best?
John: *Rage!*

You London Speak Best by Naflahk. June 21, 2011

London steamer

Farting in an elevator while masturbating.

On my way back from the bar i gave my self a london steamer, sharted, and left my underwear in the hotel elevator.

London steamer by Roughnhungrydonkey847 May 18, 2015

London Sasquatch 

Having sex with a old british lady with a hairy vagina, preferably in her 90's and on her death bed

Hey bro sorry about your grandma

Don't worry she got her dying wish

Really? What was it

Doing the old London sasquatch on her

London Sasquatch by Barkleyman05 March 31, 2016

London snake hole 

Just more useless slang for an asshole.

Anon : hey, did you know anon's such a London snake hole?

London snake hole by Best Based Lord August 6, 2016

London Switcheroo 

Inserting a tube down your urethra while masterbating, switching your ejaculate for hot gravy, creating a great side for your fish and chips.

Boy- "Baby im hungry can we do a London Switcheroo tonight"
Girl- "Sure I'll get the tube, call John and tell him to to pop to the chippy"

London Switcheroo by BlickBoiZach March 20, 2018

london system 

A chess opening where white gets the same position everytime. High skill floor low skill ceiling used by noobs alot

Some random guy plays london system
"What a noob"

london system by Braden_aka_me September 15, 2023

To london someone 

To london someone - to stab somebody using a bladed melee weapon, usually a knife or a dagger.

While it is most common to do it in the capital of UK, the term "To london someone" most likely comes from ancient Rome, and the death of Julius Caesar.

Mom: We're gonna visit grandma tommorow.
Child: But mom, what if someone londons us on the way?
---
Citizen: How did Caesar die?
Praetorian guard: He was londoned.
---
Serial killer: I am going to london someone.

To london someone by Kfestofil December 25, 2022