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Lacing is an unusual sexual perversion in which a man ejaculates into the food of unsuspecting people. The lacer gets sexual gratification from watching people unknowingly swallowing his semen.
After lacing the hot fudge, Stewart watched in silence while his neighbor's daughter devoured every bite of her ice cream.
Lacing by c_anderson February 1, 2006
To give someone a rampant, bordlerlining on violent, sexual experience
It was legendary gazz, Tecko gave her a real lacing
Lacing by Lacing January 20, 2018
Getting asked to tie someone elses shoe laces
Yo start lacing me rn!
Lacing by Cyclore February 3, 2025

Lacing up 

Verb. Lacing up is a prison term meaning that an inmate is putting on his shoes to prepare for a fight.
Inmate: Look at him. He isn't scared at all. He's lacing up right now. Get ready. Shit's about to go down.
Lacing up by Gohan Barracuda March 3, 2019

Lacing a fatty 

My main man Dave said, "I'll be
late to the party cause I'm lacing a fatty this afternoon".
Lacing a fatty by Lucky Fairlane March 15, 2010

lacing the log 

To ejaculate over ones own poop.
I had such a massive dump yesterday. It was such beaut, it kind of turned me on, so I Christened it with my own semen, thus lacing the log
lacing the log by Shredwards May 17, 2016
More from Urban Dictionary
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
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