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It stands for; Must be smokin weed! Someone who was doing crazy shit while under the influence of weed.
*Zoe* Did you just see what the kid was doing?

*Tabitha* Dudeee that kid M.B.S.W!

*Zoe* Yeah, He must have been!

M.B.S.W.
M.B.S.W. by Tabithaftw November 20, 2009

B.O.M.B.S 

B.O.M.B.S simply means Back.On.My.Bull.Shit
Hey John Angus really made me realise that I'm B.O.M.B.S again
B.O.M.B.S by Rae625 December 23, 2019

B.O.M.B.S 

Althea "Hey John Angus really made me realise that I'm B.O.M.B.S again "

JOHN"Woah...you need to calm down "there
B.O.M.B.S by Rae625 December 23, 2019

B.O.M.B.S 

Them: don't act like you don't care
Me: no fuck that b.o.m.b.s
B.O.M.B.S by bunkinbubby March 29, 2020

L.A.M.B.S 

LAMBS / L.A.M.B.S - Refers to the least productive denominator co-workers found in white collar jobs:

Bill: "Dude i spent all weekend rewriting this test module and Frank shot it down"
Ted: "Yeah dude.. Frank does nothing but meetings all day. He is SUCH a LAMB!!"
L.A.M.B.S by TerryCowboy November 3, 2018

P.O.M.B.S. 

Technically defined as "pee/piss out my butt syndrome".
"Man, last night that Taco Bell totally gave me P.O.M.B.S."
P.O.M.B.S. by DSL Jr. September 13, 2009
More from Urban Dictionary
anyone who succeeds in disgracing/over indulging themselves in the throws of clubland
28 hours and 4 clubs later, gurning for england but still refusing to go home - a total wrongun!!
wrongun by bevvers March 21, 2007
Word of the Day on October 8, 2026

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
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
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