If someone replies with cool to you on snap or IG, it means they honestly don't care and are just trying to get the conversation over with
Zoe: Yea I live in Texas
Matthew: Cool
Def 1: Someone who is awesome or likeable.
Def 2: Cold.
Def 3: Me.
Person: I'm cool.
Person 2: Fuck you dumbass retard.
Chase and Lexi. That’s literally it their the definition of cool
Bruh that’s person is a chase and Lexi their cool