?无稽之谈

...无稽之谈 groundless statement; a cock-and-bull [cock and bull] story; a false tale; a fishy story; a latrine rumour; baseless gossip [talk]; clotted nonsense; cookedup story; fantastic talk; idle assertions; mere unsupported statements; pack of nonsense; sheer nonsense; tale of a tub; unfounded talk 流言，谣言 rumor .