verb (used without object), bel·ly·ached, bel·ly·ach·ing.
British Dictionary definitions for belly-aching
Word Origin and History for belly-aching
also belly-ache, 1590s, from belly (n.) + ache (n.). The verb in the slang sense of "complain" is first recorded 1888, American English; it appears not to have been used earlier than that, if ever, in a literal sense. Related: bellyached; bellyaching.