What is 'sacrebleu' when translated from French to English?

Answer 1

The term "sacre bleu!" (or sacrebleu) is a mild French curse that is now mostly archaic, but is still used in historic contexts or as a stereotypical French exclamation. It means "sacred blue" (the rhyming word bleu replacing Dieu or 'God' in the phrase to make it acceptable, as swearing is a sin for Christians).

The Blue referrs to the robe of the Christians' Virgin Mary. In effect the user is stating that he is swearing by the Sacred Blue (robe of the Virgin Mary)

Many French "cuss" words are related to religion. Visitors to Quebec will often hear "Tabernac" (tabernacle where the host is kept), "Ciboire"(Ciborium which holds the host during masses), "Ostie" (Host).