童叟無欺 [ㄊㄨㄥˊ ㄙㄡˇ ㄨˊ ㄑㄧ; tong2 sou3 wu2 qi1] cheating neither old nor young (idiom); treating youngsters and old folk equally scrupulously Our house offers sincere treatment to all and fair trade to old and young alike. ◄ ►