When arguing with someone and it's just going on and on 'coz they don't want to see reason, so you give up arguing with them because it's pointless.
Person: Bla bla bla (basically: you're wrong, I'm right)
Me: Oh well. Believe what you want.¯\_(ツ)_/¯
Person: How are you feeling today?
Me: Meh. ¯\_(ツ)_/¯