b.
British used for saying that you do not believe what someone is telling you 行了,得了(表示不信) Go on! She didn't really say that. 行了,她并没有那样讲。
go on with you! old-fashioned : ‘Don't you look nice!' ‘Oh, go on with you!' “你看上去不是很好吗?”“得了吧。”
Synonyms and related words
Ways of saying that you do not believe something: are you having a laugh?, come, come/come now, a likely story...