bellyache
1. verb To complain or gripe about someone or something. Of course Marjorie is bellyaching about how I left dishes out in the kitchen—she's not happy unless everything is perfectly put away.
2. noun Pain in one's stomach. I've had a bellyache all day, so I'm going to have to cancel our dinner plans.
quit (one's) bellyaching
To stop griping or complaining. Often said as an order. A: "But I don't like broccoli!" B: "Just quit your bellyaching and eat it!" If the kids don't quit their bellyaching soon, I'm going to turn this car around and take us right back home.