Definitions

1. noun

a person who habitually tells lies or exaggerates the truth, especially one who is easily detected in doing so

“He was called a modern-day Pinocchio for his outrageous fabrications.”

2. noun

the long nose given to a character in a story, especially Pinocchio, that grows longer whenever he lies

“The boy’s Pinocchio was so long he had to duck to avoid hitting his head on the ceiling.”