A type of surprise attack in which you take a keyboard, and smash it over the target's head. It's an effective way to cause a lot of pain to the receiver.
Person 1: Did you here that Chad got a Welsh Concussion?
Person 2: Yeah, I did. He had it coming, he was a massive douchebag.
Person 2: Yeah, I did. He had it coming, he was a massive douchebag.
by A Quantum Entangled Cucumber September 1, 2017
Get the welsh concussionmug. by dukedaw1993 September 13, 2018
Get the Might as Welshmug. Most commonly known as Adam. Welsh is a term used for dirty mouth breathers who bum fuck sheep at least 4 times a week, if a Welsh fails to do this at least 4 times they usually resort to incest. You will normally find these "Welsh" on the streets as they are all homeless.
WARNING: if you see a "Welsh" (Adam's) make sure to wear a mask as it will get stinky.
WARNING: if you see a "Welsh" (Adam's) make sure to wear a mask as it will get stinky.
by dirty sock licker 27 May 4, 2023
Get the Welshmug. by FortniteKind0001 December 16, 2023
Get the Welshmug. 
Violently shitting your pants in a public/tight quartered space with no regard for other’s right to breath.
by bendover1969 November 18, 2022
Get the dropped a Welshmug. Engaging in the act of procreation with a sheep, but being polite enough to hold an umbrella over its head when raining.
by Sweetcheekz92 September 1, 2023
Get the Posh Welshmug.