背信弃义: treachery; act in bad faith; act perfidiously; be guilty of perfidy; break faith with sb.; break one's faith; break one's word and forget one's benefactor; go against one's words and oblig
嘴脸: [贬义] look; features; countenance 短语和例子丑恶嘴脸 ugly features
背信弃义的: disloyal not to be trusteddouble cross double-crossingfaithlessperfidious
