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The act of stuffing a woman's vagina full of grapes, then using your penis (or fist) to mash up the grapes. If you're feeling adventurous you can even use your foot. After the mashing, you may procede to drink the sweet grape elixir directly from the stanky vagina.
Christopher Walken: "Last night, I was welching, that bitch. So hard."

You: Speechless
Related Words
dude she got welched bad
i heard he is planning on welching her
welching by K3v!in @maz!ng July 29, 2010

Wenching 

When a Sailor goes out on Liberty, looking for a "One Night Stand."
"Hey, Shipmate, where ya going tonight?" "I'm going wenching. Wanna get some?"
Wenching by BeirutDude July 14, 2015
When movie-goers show up to the theater 45+ minutes before the feature presentation. The welchers usually play the movie trivia that repeats every 2 minutes and hang their legs over the seats in front of them, so no one else can sit there.
Billy: Hey Rob, let's go welch tonight... call up Jake and see if he wants to come with us.
Rob: JAKE! Wanna go welching with Billy and I tonight?
Welching by Tizz Mizzle June 27, 2007
A popular greeting amongst crypto enthusiasts. Often used formally while welcoming a MAN who has much more Bitcoin than you to an event, website, or your house (not a woman; This is because buying and selling crypto is clearly the most MANly and smartly thing any MAN can do)
"Hello my fellow male and welcoin to my crypto bank!"
welcoin by FoxxyBeb January 21, 2022
Staring at a hot guy. Most of the time your mouth is open and there is a lot of drool.
Oh my god! That guy is so hott! I'm totally welching!