A flat coke is a hot ass Male/female that has no chat whatsoever.
Girl 1: anything happened with Dylan?
Girl 2: nah he’s a flat coke
by Joeybsting June 14, 2019
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(see also flat)

Soda that has been left out too long or is old, thus losing its carbon-dioxide infused goodness that we like to call fizz. It is not good. It makes people sad.

flat's best friend and synonym is warm.
Yeah, I opened it last night, so all there was for breakfast was flat coke.
by flat coke February 11, 2008
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The worst tasting soda ever. Might be the only time to buy a regular coke.
Guy 1: Hey dude have a vanilla coke
Guy 2: Alright
Guy 2: AW SH*T ITS FLAT!
Guy 1: Bro, I hate flat vanilla coke.
Guy 1: Lets get some regular coke.
by brettheawesome June 15, 2010
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