Sacrebleu or sacre bleu is a French profanity used as a cry of surprise or happiness. It is a minced oath form of the profane sacré dieu, holy God. The holy God exclamation being profane is related to the second commandment: Thou shalt not take the name of the Lord thy God in vain.
Why do people pronounce the h in Wh?
Before rounded vowels, such as /uː/ or /oː/, there was a tendency, beginning in the Old English period, for the sound /h/ to become labialized, causing it to sound like /hw/. Therefore, words with an established /hw/ in that position came to be perceived (and spelt) as beginning with plain /h/.
Why dont we pronounce the h in hour?
H is silent in many English words, for various reasons. The words hour and honest come from French, and in these cases English took over the French pronunciation as well as the word. Not all such words that have come into English from French still have a silent h, however.