In nearly every episode, but taken to the extreme level in "Night of the Huntress!" Jaimie and Paco talk about how they have a thing for bad girls, Jamie spends almost the whole episode drooling over Huntress, and when her, Jamie and Batman are trapped inside a deathtrap, tied up together and need to escape, Huntress apparently copes a feel on Batman while trying to reach their gadgets. When Batman calls her out on it, we see her smirk, implying she did it on purpose.
"Menace Of The Conqueror Cavemen!": Kr'ull seems to have an...interesting reaction to turning his girlfriend into a cavewoman.
In the cold open for "Inside the Outsiders": every single line of dialogue between Batman and Catwoman. While Green Arrow really doesn't appreciate Batman taking the time for some flirtatious Casual Danger Dialoguewhile they're trapped, their final exchange pushes it into this territory.
At the end of that episode, it isn't said what "happy thoughts" Batman used to defeat Psycho Pirate, but given the way said cold open ended...
In "Aquaman's Outrageous Adventure!:"
Blue Beetle(regarding Planetmaster): You really don't wanna see the power of Uranus.
Wonder what the Birds of Prey would sound like doing a swing number about the sexual inadequacies of DC's superheroes? Behold!
This actually didn't get past the radar, to an extent. The episode has never aired on US television, the bit with Huntress using an index finger wag in reference to Aquaman was replaced with a scene of a giant fish tank behind her and Black Canary after the initial airing (her index finger wag is still intact when she talks about Green Arrow, however), and the episode wasn't released with the rest of the season two DVDs (but was released with season three).
But other countries such as Australia left the episode unedited.
And then there's the other reason the episode didn't air: Batman gets gunned down by mobsters. Several times. With realistic guns. Of course he gets better, but still...
"Clash of the Metal Men!" has Platinum turning into a chair for Batman with her face being the seat. Not to mention her common Double Entendres.
Just stick me into your data port!
Episode 12 of Season 2 brings us this:
Detective Chimp: Well, hello there. I don't believe we've had the pleasure. I'm Chimp. Detective Chimp. Vixen: B'wany, combine him with something, so we can escape. Detective Chimp: I'd rather he combine you and I, my dear. We'd make quite the couple, don't you think?
"A Bat Divided!"'s Slacker!Batman is very reminiscent of a stoner. He even claims a case of the munchies!
"The Criss-Cross Conspiracy" has to be the gayest Batman story ever, due in part to its aversion to Voices Are Mental. Among other things:
It gives us this little gem when Batman switched bodies with Batwoman and tries to free himself from being tied to a chair. He miscalculates and falls over chair and all.
Batman: "Apparently, my center of gravity is now much... *throws glance at his/her chest* ... higher."
Batwoman (in Batman's body) checks out Nightwing! Then she asks him if his cape "made him look fat!"
Batman (in Batwoman's body) has to flirt with Felix Faust to get his help.
The Riddler has Batman's body tied up and about to be dumped into a vat of acid, at which point Batman (in Batwoman's body) shows up.
Batman: "Sorry, Riddler, but I've grown rather attached to that anatomy!"