Have a good time
Meaning: Enjoy yourself in what you are about to do. (Often said when someone is about to leave for an event.)
Example: Bill: I'm leaving for the party now. Father: Have a good time. Sue: Tonight is the formal dance at the Palmer House, and I'm going. Mary: Have a good time. I'm watching television right here.
Example: Bill: I'm leaving for the party now. Father: Have a good time. Sue: Tonight is the formal dance at the Palmer House, and I'm going. Mary: Have a good time. I'm watching television right here.