The word flatline refers to that flat line that appears on the monitor of a heart that stops beating: “pi… pi… pi… piiiiiiiiiii”. In millennial love, this term refers to that moment when you’re talking to a potential hookup on a dating app and suddenly the conversation falls apart, it’s dead and there’s no one to revive it, hey.
Example Sentence: The conversation just went dead, totally flatlined, it was so awkward.
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