evaded reparation or satifaction of a debt, sometimes by citing a technicality
that fucker welched on the Giants - Eagles (he bet they wouldn't cover the spread and they fucking did!)
by danielwebster May 19, 2007
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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 From the outdated adjective welsh - meaning disadvantaged(in poverty and fate).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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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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The act of saying your are going to stream, then not streaming without notice and blaming it on being sick or injured - first used by viewers of lospollostv
"person 1Bro los welched again? person 2 Yep he welches almost every goddamn day, its like he is programmed to welch"
by lospollostvviewer March 19, 2017
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To "black flag".

Meaning to make a bet, and lose it. Then not follow through with the consequences.
YOU: "I'll make a bet that Carlton suck and miss the 8, loser has to suck Suzis penis."

BlackFlag: "Carlton will win the premiership you douche, i'll take your bet"

Carlton go on to stink up the entire competition, blackflag loses the bet, and ignores that the bet was ever placed. Making him a dirty welch and the lowest form of life in the universe.
by Blissid April 28, 2010
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to avoid doing something you have promised to do, especially not to pay a debt
Marty got his thumbs broken by Vito after he welched on a gambling debt.
by contractorpeon March 3, 2005
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To welch. To go back on your word. A highly derogatory word made popular through the be-mag messageboard crew in response to wirolla's act of cowardice.
Wirolla had two options; tits or GTFO. He welched, he chose the second option.
by gatsby. September 5, 2008
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