hyperbole

/hɑɪˈpɜr·bə·li/ n [U]

Definition

› a way of speaking or writing that makes someone or something sound much bigger, better, smaller, worse, more unusual, etc., than they are: Although he’s not given to hyperbole, Ron says we are light-years ahead of our time. › literature Hyperbole is also the use of such language to express humor or great emotion.

(Definition of hyperbole n from the Cambridge Academic Content Dictionary © Cambridge University Press)