徙木为信徙：迁移；信：信用。指说到做到言而有信。[查看详情]

洪乔捎书指言而无信的人。[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]

反复无常亦作“反复无常”。[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]

口中雌黄谓随口更改言论不当处如用雌黄蘸笔，涂改错字。[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]

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]

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]

三反四覆反复无常。[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]

朝三暮四原来比喻用诈术欺骗人。后来用以比喻变化多端捉摸不定。例朝三暮四昨非今是，痴儿不解荣枯事。——元乔吉《山坡羊冬日写怀》英blow hot and cold;[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]