tum
n. countable B1 Intermediate UK //tˈʌm// tum
n. a friendly, informal word for your stomach. It is often used by children or when talking to children.
n. an informal term for the stomach or abdomen. Common in British English and often used in child-directed speech.
The baby has a very full tum after lunch.
He rubbed his tum after eating a large bowl of pasta and felt quite sleepy.