A deliberate use of exaggeration for the purpose of humour/emphasis is

Hyperbole is a deliberate use of exaggeration for the purpose of humour or emphasis. It is a figure of speech that uses extreme exaggeration to make a point or to create a humorous effect. Hyperbole is often used in everyday speech, literature, and poetry to add emphasis to a statement or to make it more interesting. For example, saying "I'm so hungry, I could eat a horse" is a hyperbole that exaggerates hunger to emphasize how much the person wants to eat.