Phrases/terms that aggravate the hell out of you

I heard an example of it this morning, and it triggered a cascade of memories to the lazy people that use it:

Have a good one!

Have a good what? Day? Evening? Week? Hour? Geological epoch?

I normally hear it from customer-service types that are too motherf*ckin’ lazy to show any situational awareness. Today’s event was from a cashier that passively handed me a receipt while staring at his cellphone. This phrase has been harshing my calm for years now. . .

Tripler
Normally calm.