Douglas Harper's Etymology Dictionary
sacre bleu
stereotypical French oath, 1869, from French sacré bleu, literally "holy blue," a euphemism for sacré Dieu (1768), "holy God." From Old French sacrer, from Latin sacrare (see sacred).
Wiktionary
sacre bleu
interj. (alternative spelling of sacré bleu English)
Wikipedia
Sacré Bleu
Sacré bleu, an alternative spelling of Sacrebleu, may refer to:
- Sacre Bleu Cross, a theatrical cartoon of the 1960s' The Inspector series
- Sacré Blues, a book by Taras Grescoe
- "Sacre Bleu", a song by The Balham Alligators
- Sacré Bleu, a novel by Christopher Moore