flutterboard

[ fluht-er-bawrd, -bohrd ]
/ ˈflʌt ərˌbɔrd, -ˌboʊrd /

noun

a kickboard.

Origin of flutterboard

First recorded in 1945–50; flutter + board

British Dictionary definitions for flutterboard

flutterboard
/ (ˈflʌtəˌbɔːd) /

noun

US and Canadian an oblong board or piece of polystyrene plastic used by swimmers in training or practice Brit word: float