To be made an international fugitive simply because she loved the one true God and His Son was an unspeakable, unforgivable offense.
For this unforgivable offense, I hereby sentence you to eternal banishment from this settlement and the surrounding lands.
Food was scarce, so gluttony was an unforgivable offense.
Reciprocal favors are the key factor to maintaining one's guanxi web, failure to reciprocate is considered an unforgivable offense.
Failing to kill Andrew Salam when Hamza and Rafiq had had the chance was an unforgivable offense.
But that is hardly an unforgivable offense; in coaching searches, it seems the rule more than the exception.
He scored off a free kick with a header, an unforgivable offense in Norway (its players are supposed to be dominant in the air).
The tea was weak and almost sugarless, according to her, and the corn bread lacked enough salt and was served at room temperature, an unforgivable offense.
And they proselytize - an unforgivable offense.
The lawsuits are an "unforgivable offense against free speech and internet freedom, primary sources of free lulz (and you know how we feel about lulz)."