敗胃

败 = 攵 + 贝 : Beelzebub threatens to hurt a crab with a sledgehammer should it not obey in the airplane's bathroom. The crab has no option but to declare defeat and obey Beelzebub's orders.

胃 = 月 + 田 : Willy Walrus (w) set up a mooncake (月) field (田) in the Eiffel Tower's bathroom (ei4). This led to him eating way too much cake, and now his stomach (胃) hurts. To relief the pain he uses a hot water bottle (mnemonic symbol for 胃).