Top Definition
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.
بواسطة contractorpeon مارس 2, 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.
بواسطة Blissid ابريل 28, 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.
بواسطة gatsby. سبتمبر 4, 2008
A bear
The Welch ate the human that got too close to its cubs.
بواسطة tittieballs يناير 26, 2011
purple weed. ie: grapes.
Yo, I got dem welches!
بواسطة Lowki ابريل 28, 2006
A cling on
I had a welch all over me last night
بواسطة shalompiggin فبراير 4, 2011
a term of measurement for tea.
This bottle contains two welchs of tea.
بواسطة danbarton ابريل 1, 2009

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