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tmmbsl is used in instant messaging programs and emails etc. as an acronym for:

That made me big smile lol.

It is quite a complex "internet-speak" word because it incorporates an already used acronym within as well as using that nested acronym to just express humour rather than its literal meaning.

It is used when a situation is more humourous than to use tmms (that made me smile) but less humourous than lqtm (laughing quietly to myself).

tmms<tmmbsl<lqtm

Most widely used alongside an emoticon of a smile with teeth showing.

Another acronym that is part of the new wave of internet acronyms that are more truthful than current ones such as; lol, lmao and rofl.
Dave: ...Then the guy fell off the toilet and onto the poop he was just trying to clean up!

Roy: tmmbsl! :D

Dave: Yeah it is damn funny
tmmbsl by TomatoPoo January 2, 2008
Words you can keep
An acronym for "That Made Me Bust Out Laughing I Cannot Lie."

It is sometimes called "The new LMAO," as it is commonly used when one actually laughs at something.
Person A: i just let out the biggest load to B's mom

Person B: bro wtf

Person C: tmmbolicl
TMMBOLICL by Xavi Washere June 5, 2024
Related Words
A phrase used in texting when someone says something or you see something that genuinely makes you laugh.
It's a shorthand acronym for "That Makes Me Bust Out Laughing I Cannot Lie," originally coined as an alternative for LMAO.
Guy named Otto: bro world of tanks is a good game
The Rest of the Group Chat: tmmbolicl
TMMBOLICL by Xavi Washere June 11, 2024
More from Urban Dictionary
Acronym, meaning Too Long Didn't Understand
Similar to TLDR
Sister: This meeting was to discuss the rough draft of my essay, where we discussed the subsidiary questions I added in my rough draft. We also discussed the relationship between my main title and the real-life situations I chose to use in my essay. We discussed the structure of my essay as well, specifically the Math AOK section and how it relates to the contradiction of the title. This second meeting was particularly helpful in discussing the implications of my essay claims and how to apply the title across various areas of knowledge. There were many sections of the essay that could have been cut down in wordiness and the ways of knowing required further and more in-depth analysis.

Me: Woah! TLDU!
TLDU by L-Evans January 14, 2019
Word of the Day on August 30, 2026
the act of having anonymous sexual encounters with other men in public toilets.
Cottaging by greeef April 24, 2003
Word of the Day on August 29, 2026

Salad Days 

green inexperienced youthful judgement and cold blooded execution of those judgements.

Rashness with little concern of consequence.

Antony and Cleopatra. William Shakespeare

"My salad days,
When I was green in judgment, cold in blood."

- William Shakespeare, Antony and Cleopatra, 1.5
"How did you end up in jail?"

"Salad days, 'nuf said."
Salad Days by GilbyRFC0 October 7, 2011
Word of the Day on August 28, 2026

age gate 

An absolutely foolproof way to keep minors from viewing content deemed "too mature" for them to watch.
Billy: "So I was trying to watch some videos for an M rated game, and I ran into an age gate, so I put in my real birthday. SOMEHOW it managed to figure out that I am 12. CURSE YOU AGE GATE!!!"

Bill: "Fucking age gate! *quick scroll* THERE! I was born on January 1, 1904. Fuck you age gate."
age gate by Banja January 7, 2011
Word of the Day on August 27, 2026

board chow 

A)
The Crud that collects under the keys in a keyboard. Usually more severe in the keyboards of programmers and webmasters as they tend to spend a lot of time at the the computer and thus eat at their desk. Mainly affecting IBM Model M (clicly) style boards.

B)
Can also be used to gross out Non-Techie people
A)
Bill: want to go to the club?
Bob: No, I've got to clean out my board chow, keys are starting to stick.

B)
Bill: Want to go out to get a bite?
Bob: No, i am just going to have some of my board chow/
Bill: Whats' that?
Bob: The food scraps that collect in my keyboard; Want some?
Bill: *GAG* *HURL* *GAG*
board chow by BinaryHackerMan September 3, 2007
Word of the Day on August 26, 2026

young pup 

a young person, a young adult in their late teens/early 20s.
Ah, you're just a young pup at 23!
young pup by the dog May 30, 2006
Word of the Day on August 25, 2026
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