K-Bombed
When you reply with 'K' like it's a curse. It means you're annoyed, you're tired, and you're basically telling them to shut up.
You texted me 10 times about your cat? 'K'... I'm done.
You just told me about your ex? 'K'... I don't care.
You sent me a 500-word essay about your day? 'K'... go away.