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.
de contractorpeon 2 mars 2005
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.
de Blissid 28 avril 2010
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.
de gatsby. 4 septembre 2008
A bear
The Welch ate the human that got too close to its cubs.
de tittieballs 26 janvier 2011
Another Way To Define Graped
Welches=Brand Of Grape Juice
You Just graped A Friend
You, To Friend:You Want Some WELCHES With That?
de Leak 5 octobre 2005
a term of measurement for tea.
This bottle contains two welchs of tea.
de danbarton 1 avril 2009
purple weed. ie: grapes.
Yo, I got dem welches!
de Lowki 28 avril 2006

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