6 Things Fans Learned About 'Fuller House' Star Dave Coulier From His Reddit AMA

Fans of Dave Coulier may not be surprised to learn that he's not nearly as wholesome as his character Uncle Joey on "Fuller House."

But the Canadian-born comedian, 56, still managed to raise more than a few eyebrows when he shared on Reddit's AMA some of his naughtiest pranks pulled on co-stars Bob Saget and John Stamos.

Coulier, who was promoting his new animated musical book, "The Adventures of Jimmy Bugar," dished on his backstage antics, his early career and Mr. Woodchuck.

Here are a few things that we can share from Monday's revealing Q&A:

Watch: Dave Coulier, Bob Saget Talk 'Fuller House,' Alanis Morissette Dave Coulier Now Denies Alanis Morissette's 'You Oughta Know' Is About Him

Favorite backstage story from the original 'Full House' run

"I threw my underpants up on top of my dressing room and then it became the 'Friends' stage. Then, when we went back to do 'Fuller House,' I went in search of my underpants and climbed up on top of the dressing room to see if they were still there. And they were GONE! Someone stole my underpants," Coulier said. "And people are going to wonder 'Well why did you throw your underpants?' and the reason I did that was because I was making Bob Saget laugh. There are limited options to making Bob laugh and one of them is taking your underpants off and throwing them on top of your dressing room."

He watched 'The Unauthorized Full House Story'

"I did, and it made me laugh hysterically," he revealed. "I was on 'The Surreal Life' with Flava Flav, and 'The Unauthorized Biography' was more surreal than 'The Surreal Life.'"

He was cast on 'Saturday Night Live'

"I did a screen test at NBC. My manager Brad Grey called and said that he had talked with Lorne Michaels and Lorne said, 'It's going to be great to have Dave with us in New York this season.' And then I told everyone in my life that I was going to New York to be on 'SNL' and then Brandon Tartikoff decided that Dana Carvey and I were too similar," he revealed. "Then I had to call everyone back and tell them, 'Never mind.' Six months later, I read a pilot titled 'Full House.' I would have never been on 'Full House' had I gone to New York to be on 'SNL.'

Garry Shandling took him under his wing when he first started stand-up

"Garry and I used to do a lot of writing together. He had a cabin up in Big Bear, California," Coulier recalled. "And we would get in a little aluminum boat, go to the middle of Big Bear Lake, and sit there and write jokes for his 'Tonight Show' appearances. Two idiots sitting in a boat -- laughing their heads off."

How he came up with his 'Cut it out' catchphrase from Nickelodeon's 'Out of Control' and later 'Full House'

"I stole it from my good friend Mark Cendrowski. We've known each other since we were 9 years old. And he now directs 'The Big Bang Theory' TV series," Coulier admitted, adding that he stole the hand gestures from his friend too. "He says that I still owe him royalties from that!"

What he kept from the set of 'Full House'

"I kept the original Mr. Woodchuck. And then my dog Ranger ate his face," Coulier said, adding that the new Mr. Woodchuck on "Fuller House" was a gift from Jimmy Fallon.