Short for gots to, used by many around south London
John: what time you going to sleep?

Bob: I dunno but I gossa be up in a few hours
by Gossa November 10, 2019
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The negative of "gonna". Gonna = going to, Gossa = not going to.
Jeff: I bet you will now kill me and gain another point!
Bob: I'm gossa kill you! Don't worry!
by Chrononimo April 29, 2018
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