愿赌服输

愿赌服输
yuàn dǔ fúshū
if you agree to bet，then you must accept to lose

我输了。愿赌服输，我请你吃饭。
Wǒ shū le. Yuàn dǔ fúshū, wǒ qǐng nǐ chīfàn.
I lost it. I bet and I pay, I will treat you to a meal.

愿赌服输，那为什么你打输了麻将以后要打我呢？
Yuàn dǔ fúshū，nà wèishénme nǐ dǎ shū le Májiàng yǐhòu yào dǎ wǒ ne?
You bet and you pay. Then why do you want to beat me after you lost mahjong?