Watch Jennifer Lopez Flip Out, Shake Booty During 'Catch Phrase' On 'Tonight Show', Talk Cheating Film 'The Boy Next Door' Will Make You Yell At Screen, How J-LO's Mom Won Over $2 Million [VIDEO]

Was this the best game of Tonight Show Catchphrase ever? The Boy Next Door star and American Idol judge Jennifer Lopez and host Jimmy Fallon took on Marvel's Falcon, Captain American 2 and Black Or White star Anthony Mackie and Steve Higgins in the word-association game, which Fallon described as the "best ever". When it ends with J-Lo pointing at her shaking booty, he might just be right. J-Lo also talked about the time her mom won $2.4 million on a slot machine, and how her new movie will make you scream at the screen.

Jennifer and Mackie engaged in a friendly, hilarious game of Catchphrase, which Jimmy describes as the "best round of Catchphrase" in his life. And considering how it ends, it probably is. Watch it below:

But back to her mom: J-Lo explained just what happened when her mother Lupe scored big on the slots. "This is years ago, like, I don't know, 10 years ago," says the "Booty" superstar. "She was at the Borgata, and I just get a call and she's really calm, which is not my Mom. Lupe, she's out there. In the best way possible. She loves to dance.

"Anyway. She was at the Borgata, and she's like 'Jennifer' and I'm like 'Ma?' She's like 'yes.' I knew something had happened... What's wrong...."

Jennifer then impersonated her mom screaming "'I won $2.4 million, I won $2.4 million!' And I was like 'What?'

"On the slots of all things," laughed Jennifer. "Progressive jackpot or something, I don't know. She described the whole moment; it took forever, play-by-play. 'And then the 7 came down... but it passed...'

Find out how Jimmy 'warmed up' the Wheel of Fortune slots for J-Los mom below:

Jennifer also talked about her new 'revenge' movie The Boy Next Door and explained the ideas behind the film, where J-Lo has a fling with the 19 year old boy next door as her life is falling apart.

As J-Lo says, it's the sort of movie that will have you yelling at the screen. "It's the type of thing where she feels so bad for herself, you're like you get it... but [it's like] argh, don't do it, don't do it, it's not the right thing... but I get it, but don't do it, but he's kind of hot too, so anyway, she crosses a line she shouldn't have, and all hell breaks loose." Find out what else she had to say below.