Meet Nickelodeon, one of the first kids' only cable channels ever. Not just for kids, though, as clearly shown here. This channel rivals Cartoon Network in terms of radar breakage, though Cartoon Network will always be known for going farther than Nickelodeon ever will, as Nickelodeon has very strict rules on what they can and can't allow on a channel meant for children and families. Cartoon Network, however, caters to both kids and the immature 20-something crowd, so CN's content tends to go to places that Nickelodeon hasn't been able to do since the days of The Ren & Stimpy Show and Rocko's Modern Life.
Specific examples include:
Freakshow: Your beloved children have but a day to return my Reality Gems. Should they fail... well, let's just say I've got plans...
Jazz: So, in other words, we're just gonna sit around until you get your stones.
No mention of this?
Sam: Promise me you'll keep your pants up?
Danny: I'll try.
From "Secret Weapons":
Jack: (suggestively) The kids are gone, we have the house to ourselves . . . I'll get the checkerboard!
Maddie: *looks irritated*
There's also Ember McLain's song. We only hear the refrain in the show itself, but it was available to listen to for free on Butch Hartman's website, and it seems to tell the story of how she died. Near as anyone can tell, she killed herself, possibly via self-immolation ("Like dead trees in cold December/Nothing but ashes remain") after discovering her "boyfriend" was actually only using her for a quick lay ("To you, I did surrender/Two weeks, you didn't call").
In All Grown Up!, in the episode Super Hero Worship, there's a scene where the gang is going into a building. The name of the building escapes me, but you can only see two letters of the name for about 10-15 seconds in the upper-right-hand corner of the screen, and they stand out quite a bit from the rest of the background. Guess which two? H. O.
One episode had Phil walk in on Lil while she was trying on a new bra. Screaming ensued.
Oh yes and remember the infamous "A kid his age should be outside playing with his friends, not sitting alone in his room bopping his Boppo." line Phil once said about Chuckie in the original series? Well All Grown Up did have a little Continuity Nod to this on how Angelica once said "Remember when I use to bop your Boppo?" to Chuckie. While one could argue that this is more of a Innocent Innuendo but considering how the original line is often viewed lets just say some viewers were rather amused by this scene.
In Wouldn't It Be Nice?, an episode where the kids "pretend" marriage for class, quite a few kids (including the main characters) get paired with someone of the same sex.
The Christmas episode has numerous references to God, and Lil outright states it at one point. There's also a reference to Jesus when Chuckie gets offended by a restaurant's "born in a manager special."
For its live action kids shows (especially the Dan Schneider shows): "Oh My God". gratuitously used by the characters. that's all.
As Told by Ginger did this a couple of times. Some of the most common are any scene that references Courtney stuffing her bra. (In particular, when she went to a high school party, and the high school girls (in an effort to knock her down a peg) remove her bikini top to reveal how underdeveloped she really is.) It could also be said that her feelings for Ginger border on Les Yay. And let's not forget the episode Carl and Maude, where Maude was stuffing her face with brisket and Carl said, lovingly, "She eats like a wild cougar"
Another episode features Courtney trying to persuade French exchange student Jean-Pierre to go to first base with Ginger, and Miranda trying to persuade him not to. One scene has her talking about the attractiveness of various girls in a very enthusiastic way
Drake: Girls are just guys without- *pauses and lets out a short sigh*
A 2013 Kids' Choice Awards ad features the host (Josh Duhamel) dressed as Katy Perry, shooting whipped cream from a bra. What.
In one episode of Teenage Mutant Ninja Turtles (2012), a sea monster latched onto the turtles' submarine and moaned amorously. That, along with the turtles' reactions and the line, "We're not that kind of sub!" should give you an idea of what was going on.