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1. not appropriate

2. by surprise

3. incorrect, not accurate
His claims are totally off base.
off base by The Return of Light Joker November 21, 2010

Off One's Base 

adj. A person that is crazy or behaving in idiotic ways
"you are so off one's base"
Off One's Base by Get a mug April 6, 2022

based off of 

a way to say "based on" when you want to sound dumb and use an extra syllable
"The movie was based off of the book."
based off of by it'sokaytothink August 9, 2012

based off 

Verbal phrase selecting one of the infinitude of things that something is not based on.
Want to hear my new idea for a weapon? It's based off The Little Mermaid by Hans Christian Anderson. What? Oh sorry, it's based on laser technology.
based off by AnnoyingBoomer September 11, 2021

based off of 

Verbal phrase that identifies one of the infinitude of things that something is not based on.
Want to hear my new idea for a weapon? It's based off of The Little Mermaid by Hans Christian Anderson. What? Oh sorry, it's based on laser technology.
based off of by AnnoyingBoomer September 11, 2021

The Egyptian Horoscope Is Based Off Elephants 

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The Egyptian Horoscope Is Based Off Elephants
More from Urban Dictionary
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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