Uncle Jesse’s signature catchphrase on Full House, usually delivered by John Stamos with a hair flip and total sincerity. ‘Have mercy’ remains shorthand for the show’s whole era — and at ’90s Con in 2026, the mere sight of Stamos back on stage with his castmates was enough to send the catchphrase rippling through the hall before he even said it.
(Paul Danese / Wikimedia Commons (CC BY-SA 4.0))
Mentioned in: Everywhere You Look, Still: Why the Full House Reunion Felt Like Coming Home