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school boy error 

school boy error is when you make a simple yet stupid mistake. you feel stupid after you've done it.
"i just locked my keys in the house!"
"haha, school boy error!!"
school boy error by Jak Bucket September 3, 2005

Schoolboy Error 

Definition of Schoolboy error...

"getting the basics wrong" ... especially when you should know the answer
Expecting to be able to buy tickets "on-the-door" when U2 are coming to play in the Village Hall that night... to discover that all 250 were sold out months ago...
Schoolboy Error by Ian Cameron November 14, 2003

Schoolboy Error 

Schoolboy Error: (n.), (der. old English), A mistake, often trivial, clumsy, dimwitted or easily avoided. Generally shameful in hindsight, but without cause for embarassment, owing more to circumstances or instantaneous bad luck, rather than serious incompetence of behalf of the maker. Derived from the "trial and error" psychology present in Victorian-era English public schools.
Upon dropping the soap in the Violent Offenders' Wing of Barwon Prison, Eric cursed his schoolboy error.

Dr. Feynmann lowered his glasses as the fruit of twenty minutes labour yielded an unwanted result: E = mc^2/0. "Well fuck me", he said, turning to the class. "I seem to have made a schoolboy error."
Schoolboy Error by Jerkov October 6, 2009

Schoolboy Error 

For a person of experience to make an error in a situation where she should know better.
Often used by soccer fans in the UK when describing a naive or careless error by a professional player.

"Blimey... that's a bad mistake by Beckham. A real schoolboy error!"
Schoolboy Error by A Hume February 6, 2007

schoolboy error 

The most basic of errors. An error so simple, and avoidable, that anyone with an ounce of credibility or experience in that field should not be commiting it. A mistake that should only be made by school boys still in training for that particular task. Especially used when referring to playing games of pool in pubs, or occasionally during snooker. Schoolboy error can be heard ringing out by jeering onlookers if for instance a participant missed a sitter = he should have potted it as it as so simple, that thereforehe is reduced to the level of a lowly school boy playing his dad for the first time.
And here comes Keane for the winner....Oooooooh and he's missed, and left the black right over the pocket for Swann to tap in...
Schoolboy error!
schoolboy error by GF November 23, 2007

Schoolboy Error 

Offering one's hand to other person to shake, only to retract and to laugh in their face, whilst repeating said words. Pioneered by Soccer AM.
"Aha! Schoolboy Error! Sit Down! Shut up! And tidy your room!"
Schoolboy Error by Rhys September 16, 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
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