The Batarang Money Clip
Imagine this: You're on a date. As usual, things aren't going very well. She's finished her 3rd drink and still sees a slack jawed lummox when she looks across the table. The tab arrives. You, being the sucker that you are, dig in your pockets for your money to pay the tab....
...you whip out your batarang money clip with a fat stack of 5s stuffed in it. Bang! Pow! Crash!!!! #@%&*!!! She is mesmerized by your awesomeness. Swoon. You get laid.
This is the perfect gift if you happen to also own the Jet Turbine Powered Batmobile.