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RTFMs big brother, it stands for Problem Exisists Between Chair and Keyboard. A popular term among office network engineers and IT support departments, it arose due to a need to descretly describe arrogant users (who falsly believe the system or computer is at fault) in thier presence with a suitably techinal and legitimate-sounding term.
"My document is GONE!"
"Don't worry ma'am, its just a PEBCAK. John!, We got a PEBCAK on station 4!"
"Ok, I'm on it"
"Don't worry ma'am, we'll fix it"
PEBCAK by Hexinet May 8, 2006
What the actual issue is on 90 percent of all calls to technical support/I.T. help desks, it is an acronym meaning "Problem Exists Between Chair And Keyboard."

The use of this term became common when tech support people began to have a need to vent frustration on arrogant callers who had, in fact, themselves caused the problem, yet continued to insist it was the computer's fault, or the techie's fault.

So you would explain to the user that it was a PEBCAK error, and then walk them through how to fix it.
John (technical support person, just leaving work, holding his head in his hands)...

James (technical support person just coming on shift, passes John on his way out)

James: "Rough day today, John?"

John: "Yeah, 99 percent of my calls today were PEBCAKs...do they make Excedrin in one-pound tablets? I have a headache the size of Texas!"
PEBCAK by Kalisiin January 19, 2011
Problem Exists Between Chair And Keyboard
my grandpa vs. an iMac
PEBCAK by boomer May 22, 2001
Pebcak stands for "problem exists between chair and keyboard" thereby referring to a computer problem that is operator induced.
Between computer support techs: That problem Joe had with his computer was a pebcak problem!
pebcak by Anymouse524 January 13, 2011
/pen/ \ˈsak\

Scrotum and testicle package, adjoined to a very slender, "Pen-like" penile shaft.

See: Pensakian - of, or pertaining to Dachsunds.
*Cough*, Man! He was sporting a real Pensak.
Pensak by JohJohnsderRicky March 14, 2017
A term used by game show enthusiasts to describe an individual who is adept at obscure Japanese game shows. The term was first associated with the game show "Watashi o Kaikosaseru", which is loosely translated to "Get Me Fired".
Did you see that guy competing in that weird game show Wheel of Fish? He's a pro, practically a Pensak
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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