说不过去

说不过去:

Literally means:

cannot be justified or explained away; have no excuse.

Actually means:

It means that what one does is unacceptable or does not comply with the widely recognized code of human conduct.

It may also mean that one fails to do something well so he cannot justify himself or report it to related parties. It implies blame.

说不过去，指事情做得太过分,在情理上说不通,让人难以接受。或指事情做得不好或不完满,无法向有关方面交差。它含有责怪的意思。