(one’s) blood runs cold One becomes seized by an acute and intense sensation of fear, panic, horror, or dread. My blood ran cold when I overheard that a police officer had been asking about me at work. Janet could feel her blood run cold when the murderer she was testifying against walked into the courtroom.Click to see full answer. Herein, what does it made my blood run cold mean?phrase. If you say that something makes your blood run cold or makes your blood freeze, you mean that it makes you feel very frightened. [emphasis] The rage in his eyes made her blood run cold. He could hear a sudden roaring.Furthermore, what is idiom grammar? An idiom is a commonly used expression whose meaning does not relate to the literal meaning of its words. Formal Definition. An idiom is a group of words established by usage as having a meaning not deducible from those of the individual words (e.g. over the moon, see the light). Got it? One may also ask, what does it mean to die in cold blood? in cold blood. COMMON If a person kills someone in cold blood, they kill them in a calm and deliberate way, rather than in anger or self-defence. They murdered my brother. They shot him down in cold blood.What does ice water in veins mean? Definition of ice water in one’s veins US, informal. : the ability to remain very calm and controlled in a situation in which other people would become upset or afraid I can’t believe how calm she was the whole time. She must have ice water in her veins.