To bring down the mood of a party or social situation by being excessively awkward or depressing. Similar to being a Debbie Downer or Negative Nancy.
"This party was awesome until that douche came and welched it up."

"Dude, you're being such a welch."
by douchedecon August 9, 2008
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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 13, 2006
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Fucking gov welches ma money, damn taxes!
by KaaDeee August 16, 2006
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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
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The legendary lead singer of the indie rock band Florence + the Machine.

Queen Of Peace/ Angel / Celestial being.
Has gr8 hair and has amazing style. She is sadly under rated ( not many people thought she should headline Glastonbury, though she proved them wrong). She is known 4 songs like Dog Days Are Over and Shake It Out but there are songs like Drumming Song and Delilah that are just as good or better that should b known 2. She has won several awards but even with a total of 8 nominations 4 a Grammy she still hasn't won 1.( This looks like Leonardo DiCaprio).Her performances are indescribably amazing, they are perfect and she doesn't use auto tune and lip-sync unlike SOME "artists". Her voice is an ocean. A lot of people would say her music videos r weird but it's very creative and people r 2 dumb 2 figure out the meanings behind these videos. Nowadays people only watch music videos with idiots shaking their ass and when they c a video by Florence they don't find it normal. Florence is someone who deserves more love.
Me:Do you know Florence Welch?
Person:No
Me: Seriously these people live under rocks.
by 2fast43dom March 21, 2016
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Incompetent representative who knows nothing about economics or anything in general.

Usually found doing stupid shit like handing out flyers
Hey Jim, there goes a Peter Welch (pointing at incompetent politician)
by ibanker1 January 14, 2010
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A literal queen. She is the lead singer in a band called Florence and the Machine. She has a book called useless magic, with lyrics and poetry, as well as some pictures she made.
The lead singer in Florence and the Machine is Florence Welch. She is a queen.
by flyettyeet October 24, 2018
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