Treated someone like the Welsh have been throughout history, that is ripped off. So the winner of a bet may recieve a welsh prize - nothing. From the outdated adjective welsh - meaning disadvantaged(in poverty and fate).
TheTruth : Yeah Dave did win the bet but I think he may be Welsh so it doesnt count.
Dave : I've been welched
by anothermadeupname April 20, 2010
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'Welching' is the clunking of the base of a beer bottle or glass, whilst making various grunting or 'pirate-sounding' noises such as arrrrrr, or oarrrrr... etc etc. This is as opposed to 'clinking' or 'chinking' of the top of a bottle, and it perceived as far more masculine when in a group of lads who are all very drunk, and in agreement of a certain point of topic.

It is often accompanied by the raising of one's right elbow upwards, whilst making other peculiar noises, that would suggest that one has slightly lost the plot.
There was some serious welching going on last night!

When in agreement, one member calls out 'welching!' and group members proceed to welch in above said fashion.
by ukbuckstop July 9, 2010
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The Welch ate the human that got too close to its cubs.
by tittieballs January 27, 2011
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so drunk death is your near future a trip to the hospital is also an extreme possibility
Dude i was welched last night supposedly i made love to a jar of peanut butter.
I was welched last night, I had to go to the hospital and they stuck a cathater in my pee hole.
by Asianpersuasion012 December 22, 2008
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Named after Welch's grape juiced, being Welched is being so thirsty to the point where you could down any liquid in less than 3 seconds.
I was so welched, I straight downed that pitcher of sweet tea in 2 seconds
by AfterSchoolJakAttack October 23, 2018
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when the combination of two things is amazing
Eugene mixed the ice cream with the fruit punch and it ended up being welch!
by igotthejuice September 4, 2015
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To be Extremely good looking;Popular;Well Liked; Cute
Man, That Paul is sure a Welch. We should just call him Paul Welch!
by Cathy123 November 24, 2006
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