Can be used to describe something that's on the better side of mediocre; you either don't care for it but think it's acceptable, or something that's bland but inoffensive.
Can also be used as an affirmative, but indifferent response to a command.
an ambiguous phrase, that can be used as it is or didatic about a person's current state (which is me).
it means either im actually ok or im not okay. the deceptive abilities of this phrase are high, so always ask for a different answer or elaboration if something seems off. they can wish that someone would care sometimes.