One of the kids ask if Jill has kids. Jill replies that everything is working properly and that she gets a reminder every thirty days or so. That "reminder" is her period. When she says that everything is working properly, she means that her reproductive system is working properly.
At the beginning of the movie, they show alot of sets of twins. One set says that as she was coming out of her mom, she kicked her twin inside her mom.
Jack/Jill's hides melons in his bra.
Jill refers to the movie Pretty Woman, and says "the one where she's a hooker"
Women on a cruise ship wear skimpy bikinis.
Elsewhere we see very low-cut dresses and other revealing tops.
A woman at a New Year's Eve party reports, "I'm not wearing any underwear."
Another woman announces that she works at Hooters, as she grabs her clothed chest.
Jill makes comments about two "hookers" at a party. And at Felipe's picnic, she dances and shakes her clothed breasts.
An old man in the crowd grabs her backside.
Another guy manages to look up her skirt, reporting to his friend, "It's not a guy."
When thinking about a good user name for a dating site, Jill says, "How about Manilow? 'Cause he can use me anytime." Later, after Jill fails to receive any responses on the site,
Jack secretly posts a sexual innuendo-laden ad on Craigslist to stir up lots of responses for her. But Jill balks at Jack's suggestion that she date Al Pacino, saying, "All he wants to do is play Twister with your sister!"
Pacino smirks over the phone, "I can smell horny across an ocean!"
In desperation, Jack scrambles into a public bathroom and dresses up as his sister to have a date with Pacino. He fills her bra with two cantaloupes, and when he steps out of the stall, the bathroom attendant motions him over and adjusts his melons so they look right.
Later, Jill is standing in the hallway and the bathroom attendant spots her and mistakenly gives her another adjustment.