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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 18, 2017
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Sep 6 Word of the Day
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Damn that was a steezy ass kickflip son!
by niggaliciouszor April 29, 2007
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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 02, 2005
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Dumb ass bitch who never does what they say they're going to do.
There's a welch on the phone who said she'll be here at three, but we all know she's not going to show up today.
by Squeaky_lil_b May 04, 2016
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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 04, 2008
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