Bellyache is a pain inside your abdomen, especially in your stomach.
例句
They may complain of diarrhea or bellyache.他们可能会主诉腹泻或腹痛。
VERB
无病呻吟；反复大声发牢骚
If you say that someone is bellyaching, you mean they complain loudly and frequently about something and you think this is unreasonable or unjustified.