Definition of blood-chilling in English:

blood-chilling

adjective

Hyperbolically, Humorously
  • (hyperbolically) such as to make the blood run cold; terrifying, horrifying; (later also in weakened use, especially humorously) awful, dismal; compare to make the blood run cold, "chill", "spine-chilling [noun]".

Origin

Mid 17th century; earliest use found in John Vicars (1580–1652), chronicler and poet.