The Collaborative International Dictionary
Tum-tum
Tum-tum \Tum"-tum`\, n. A dish made in the West Indies by beating boiled plantain quite soft in a wooden mortar.
Wiktionary
tum-tum
Etymology 1 n. A dish made in the West Indies by beating boiled plantain in a wooden mortar until it is soft. Etymology 2
n. 1 (context childish informal English) stomach 2 (context childish informal English) abdomen