Wiktionary
choo-choo train
alt. 1 (context childish English) A railway train. 2 A spoonful of food (when encouraging a spoon-fed child to eat). n. 1 (context childish English) A railway train. 2 A spoonful of food (when encouraging a spoon-fed child to eat).
Usage examples of "choo-choo train".
It's just an awful choo-choo train, and its name is Blaine the Pain.