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It Would Be Dangerous Not To
1: Thoughts on grabbing a case of Lite and getting bulge tonight?
2: IWBDNT
IWBDNT by AstorBrady February 14, 2018
ISBN also called I.S.B.N. stands for International Standard Book Number. Any book which is published must have ISBN, it is a unique machine-readable identification number, which marks any book unmistakably. This number is defined in ISO Standard 2108. The number has been in use now for 35 years and has revolutionised the international book-trade. 170 countries and territories are officially ISBN members. The ISBN accompanies a publication from its production onwards.
Microsoft Office PowerPoint 2003 Step by Step has ISBN 0-7356-1522-5
ISBN by Rajneesh Sharma February 22, 2009
Integrated Services Digital Network

ISDN is a communications standard for sending voice, video, and data over digital telephone lines or telephone wires. It supports data transfer rates of 64 Kbps and can support two lines at once (calles B channels), which allow you to use both lines to transfer data; this gives you data rates of 128 Kbps.
Wow! I had no idea ISDN was so much better than PSTN.
ISDN by James T. Carson April 23, 2006
A word to describe Jonathan when he thinks about Johanna.
Why are you so Isbdin?
Isbdin by 🤪😂 December 28, 2018
It still does nothing.
ISDN by Soiled Undergarment August 7, 2003
Integrated Services Digital Network.

Technology to completely digitize the phone service that was abandoned after much work (it began in the early 1980s) in the early 1990s becayse it was too expensive. It is currently used for high-speed Internet access, slower than T1 but faster than a modem. It is widely used by phone networks in some areas.
I don't have ISDN access
ISDN by Larstait November 6, 2003
More from Urban Dictionary

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

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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