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4.
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
by Nicolas Cage: Time Traveler August 13, 2010
 
1.
'Welching' is the clunking of the base of a beer bottle or glass, whilst making various grunting or 'pirate-sounding' noises such as arrrrrr, or oarrrrr... etc etc. This is as opposed to 'clinking' or 'chinking' of the top of a bottle, and it perceived as far more masculine when in a group of lads who are all very drunk, and in agreement of a certain point of topic.

It is often accompanied by the raising of one's right elbow upwards, whilst making other peculiar noises, that would suggest that one has slightly lost the plot.
There was some serious welching going on last night!

When in agreement, one member calls out 'welching!' and group members proceed to welch in above said fashion.
by ukbuckstop July 09, 2010
 
2.
the act of stealth revenge
dude she got welched bad
i heard he is planning on welching her
by K3v!in @maz!ng July 29, 2010
 
3.
To get the fizzy drink welch and use a funnel and funnel it down a mans penis hole and to eject it out via urinating and into another male/females nose then drunk with a straw.
Heyy john want to welch? john: sure i love welching shoot it up my nose then i will drink it out gee wiz guys we shuld have a welch party
by the averice of man November 21, 2010
 
5.
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?
by Tizz Mizzle June 05, 2007
 
6.
When movie-goers show up to the theater 30+ 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?
by Tizz Mizzle June 15, 2007
 
7.
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!
by Brenna; Natalie; &Lauren April 12, 2006