三反四覆反复无常。[查看详情]

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]

信口开河随意乱说。例刘姥姥是信口开河。——《红楼梦》英shooting off one’s yap; lie in one's teeth; talk at random;[查看详情]

言而无信亦作“言而不信”。说话不讲信用。[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]

空头支票支付不了的无效支票。英counterfeit check; bad check;借喻言而不行、轻诺寡信者。例开了一大把空头支票。英an empty promise;[查看详情]

背义负信见“背信弃义”。[查看详情]

轻诺寡信随便许诺而往往不守信用。例但缓时日以待之吾家非轻诺寡信者。——《聊斋志异凤仙》英make promises easily but seldom keep them;[查看详情]

背盟败约背：违背。盟、约：誓约。败：败坏。指撕毁。背叛誓言撕毁盟约。[查看详情]