What is Ping-and-ting?
1.
Microwaveable food, especially pre-prepared meals.
So-called because of the sounds the microwave oven makes: the "ping" of punching in cooktimes, and the "ting" heard when the cooking is through.
Marge: Why not come over for dinner tonight? I'll serve lasagna.
Annabel: But you're so busy these days! I don't want you to go to any trouble.
Marge: Oh, it's only a ping-and-ting.
See