自食其言自己说出的话不算数。比喻不守信用。英break one's promise;[查看详情]

信口雌黄古时写字用黄纸写错了就用雌黄涂抹改写。比喻不顾事实随意乱说。英make irresponsible remarks; talk sheer nonsense; wag one's tongue too freely;[查看详情]

言而无信亦作“言而不信”。说话不讲信用。[查看详情]

一言难尽形容事情曲折复杂非一语能够说完。[查看详情]

口血未干古代会盟时必歃血因以指新近结盟。例口血未干而背之。——《左传》英before the blood of the oath is dry—breaking an oath which is just made;[查看详情]

口说无凭空口所言无凭无据。例放你不值什么只不知你谢我多少？况且口说无凭写一张文契才算。——《红楼梦》英oral expressions can not be taken as evidence; words of mouth alone don't carry conviction;[查看详情]

背信弃义背：违背；弃：丢弃。指不守信用不讲道义。也作“弃信忘义”例背惠怒邻，弃信忘义。——《北史周本纪》英break faith with sb.; go back on one's word;[查看详情]

出尔反尔原指你怎么对人行事人也怎么还报你。现多指反复无常言行前后自相矛盾。英go back on one's words; contradict oneself;[查看详情]