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A substitution of the first two letters of "irritable bowel" as the initials of someone who always has to take a shit at the worst time
I.B. Clarkson (Irritable Bowel Clarkson) could not hold it until the next exit, so he had to take a shit in the woods.
I.B. by scroty G October 6, 2009
INSTANT BONER- refers to a female that can make a mans man stand to attention..
As soon as Alika walked in the room i knew she was an I.B.
I.B. by j*rocktrixxxkilla May 21, 2008
Abbreviation for in bed. Usually safe to use when within earshot of parents, teachers, or anyone else who may disapprove if they heard the actual joke.
Student 1: "All this work is killing me!"
Student 2: (notices teacher nearby) "I.B."
I.B. by whohastoknow January 24, 2011
Ittie Bittie Tittie Commitee
Not Only Is She A Memeber Of The I.B.T.C.,
But She Is Also The Presedent.
I.B.T.C. by Arrow April 24, 2004

I.B.I.S.H. 

"I Believe In Sherlock Holmes."
A saying that many Brits have been saying after BBC's Sherlock's (2nd) Season Finale had aired. They started saying these things because on the episode, Sherlock died in disgrace, everybody believing that he had made Moriary & other cases up in order to gain more public popularity.

A sign to others that you are a Sherlockian.

(In other cases, "Moriarty Is Real" suffices as well.)
"Ugh," says the non-believing ninnymuggins. "Sherlock is a fraud, he killed himself just because things didn't go as he schemed."

All of a sudden, a Sherlockian fangirl appears and shows the non-believing ninnymuggins the badge on her shirt. 'I.B.I.S.H.' was written on it in beautiful magic markers.

"MORIARTY IS REEEEAL!!!" Says the fangirl, and she throws a BAFTA at the non-believing ninnymuggins in anger. "Fuck you, Martin Freeman won a BAFTA!" She screams, then walks away proudly.
I.B.I.S.H. by danceisaspork February 5, 2012
Itchy Ball Syndrome.

1. One suffering from lack of sex, usually of the male gender.
Man 1:My god, I've got a bad case of I.B.S
Man 2: Wow, how long has it been, man?
Man 1: About a week.
I.B.S by Zhyre December 26, 2007
More from Urban Dictionary

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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