The opposite of flattering.
Can be used to avoid lying when someone asks you if they look fat if said quickly enough.
Girl: Do these pants make me look fat?
Guy: No, it is very fattering.
Girl: Thanks.
by chicky noodles May 24, 2014
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When something should look flattering on you, but just makes you look fat. Fattering.
Used in a sentence - 'I'm not so sure about those pants... they're kind of fattering.'

Or when you're trying to give a compliment, but don't think it's deserved- 'Wow! Those pants are extremely fattering!'
by jd9d April 6, 2010
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A lighter that doesn't do much but lazes around all day.

It can be personified to refer to a human being or animal or even a bird.
Bogdan: Hey Mech Adams, can you pass the lighter?

Mech Adams: Oh, that one? That's a fatter.

Joe & McAdams: Sorry, what?

Mech Adams: It doesn't work; it burns neither calories nor cigarettes.

--

Joe: Hey, let's work on the assignment tomorrow.
Donald: Sure, I'll find someone on Fiverr.
Joe: You fucking fatter.
by momalord March 5, 2022
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To gain more fatness, or to become more fat than you were before.
Holy crap, Joe, did you just get fatter?
by Hampikizzel Fo' Shizzel May 29, 2005
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When an outfit makes a person look extremely fat.
"Wow. That dress is so fattering on her."
by Pumpernickle Jonny April 29, 2010
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