tummy
n. countable A2 Elementary US //ˈtəmi// UK //tˈʌmi// tum·my
n. a child's word for your stomach or belly. You use it when talking to children or when you want to sound cute and informal.
n. a colloquial or childish term for the stomach or abdomen. Often used in domestic contexts or when discussing minor ailments with children.
The baby has a full tummy after eating.
She rubbed her tummy after the large holiday meal, feeling quite full and satisfied.
Imitating a child's attempt to say stomach, via archaic colloquialism stummy. Compare twee and pasghetti for similar phonetic reductions.
Usage
Commonly used in the phrase 'tummy ache' to describe a stomach ache.