John Stamos Reveals Who Was Behind His Full House Catchphrase 'Have Mercy'

updated 04/17/2016 AT 07:45 PM EDT

originally published 04/15/2016 AT 12:30 PM EDT

At long last! John Stamos has revealed the origins of his Full House character's iconic catchphrase, "Have mercy!"

At last weekend's taping for the TV Land Icon Awards, airing this Sunday, Stamos explained that famed director and producer Garry Marshall, whom he's previously called his "showbiz godfather," was the person who prompted him to come up with the now-famous line, which became Uncle Jesse's signature line on the hit '90s sitcom as .

John Stamos Reveals Who Was Behind His Full House Catchphrase 'Have Mercy'| Full House, Fuller House, TV News, Garry Marshall, John Stamos

Garry Marshall (left) and John Stamos

Jerod Harris / WireImage

"He always said, 'Get a catchphrase, you need a catchphrase,' " said Stamos, 52, according to Entertainment Weekly. "I'm not kidding you. The 'have mercy' thing came out of, 'Oh s---, Garry told me I had to have a catchphrase."


And coin a catchphrase he did – along with the rest of his costars, who got laughs by saying, "How rude!" "Cut! It! Out!" and "You got it, dude," to name a few.

As for Marshall, 81, who presented Stamos with his Icon Award, he gave some background on the history behind repeating phrases to create catchphrases on television.

" 'Sit on it' we had to put on Happy Days for 10 weeks," said Marshall, who created and executive-produced Happy Days.

He also explained that it takes time for audiences to pick up on the recurrence.

"The cast kept saying, 'Nobody laughs,' " Marshall said of "sit on it."

"It takes a minute," Marshall said, before praising Stamos. "[John] was brave enough to do it."

The TV Land Icon Awards air Sunday at 9 p.m. ET on TV Land.

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