Tank Girl: Listen up, cause I'm only telling you this once. I'm not bedtime story lady, so pay attention. It's 2033. The world is screwed now. You see, a while ago this humongous comet came crashing into the earth. Bam, total devastation. End of the world as we know it. No celebrities, no cable TV, no water. It hasn't rained in 11 years. Now 20 people gotta squeeze inside the same bathtub - so it ain't all bad.
Art Shift: The movie is interspersed with images drawn in the comic book style, as well as a few somewhat related animated sequences.
Artistic License Astronomy: The impact of a comet somehow destroys so much of the Earth's water that it hasn't rained in 11 years.
Bad Boss: Kesslee, Up to Eleven. He kills a loyal minion/doctor because she couldn't repair his face. So, downloading him into a holographic projection of his head is somehow an IMPROVEMENT?!
Boyfriend Bluff: Tank Girl pretends that Jet Girl is her girlfriend to get Sgt. Small to leave Jet Girl alone.
Bring It: Kesslee's gesture to Tank Girl's tank just before it starts firing at him.
Crowd Song: Cole Porter's "Let's Do It" in Liquid Silver.
Death World: Let's see, an evil Mega Corp with its own Mildly MilitaryElite Mooks hunting and killing whoever they can find, almost no water, monster killer kangaroos... check, check and check. Granted, it's pretty heavily parodied and subverted by the end.
Hypercompetent Sidekick: Tank Girl is fairly competent on her own, but her sidekick Jet Girl is significantly saner and somewhat more practical, meaning that because of her most of Tank Girl's schemes don't end with her dead.
Idiot Ball: Tank Girl deciding to stop for a musical number in Liquid Silver instead of escaping.