turn the air blue
Definition from Wiktionary, the free dictionary
- (idiomatic) To speak a stream of bad language; to curse and swear.
1893, Isabella Castelar, The Spanish Treasure: A Story of Love and the Love of Gold, page 228:
- ... he then relieved his feelings by kicking the lot, collectively and separately, swearing continuously in a strain calculated to turn the air blue all around him.