slang: The Brazilian version of thx. It's derived from the Portuguese word obrigado/obrigada, which, of course, means thanks.

slang: Oldie but a goodie/old but gold. Used when talking about something that is very old but still good.
1: obg
2: seja bem-vindo

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1: That TV show is obg.
2: Yup!
by justsomerandomcrap13 December 21, 2017
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Quis : damn look 👀 lil bby got a fat ass bro
Reece: OBG(on big god) she bad asf
by ReeceBandz May 11, 2020
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Oldie But Goodie, a term used to describe an ageing slapper who's still worth a donkey punch.
Matt: "Look at her, dirty old slag".
Mart: "Yeah, I'd still giver her one though, she's an OBG".
by Martin July 19, 2004
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'Oh By George!'

An exclamation, not dissimilar to 'OMG!'.
'OBG! She's got so fat!'
by Uberton July 27, 2009
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Only Barely Gay

To be only barely gay. Can also be used as a gentle word to describe pretty much anything.

Is the evolved and purified version of nohomo
Dude, that was totally OBG.

or
Lol this carpet is obg.
by souptime January 15, 2019
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