flapjack (n.)youdaoicibaDictYouDict[flapjack 词源字典]
pre-1600, from flap (v.) + jack (n.), using the personal name in its "generic object" sense. So called from the process of baking it by flipping and catching it in the griddle when done on one side.[flapjack etymology, flapjack origin, 英语词源]