It's been 2 months since I've been searching how to do this trick but I've been so desperate to find out so I signed up here (Sorry if this isn't the right place to ask help from Magicians). I've seen this trick performed 2 times, once on Penn and Teller and once on David Blaine's specials. It's an effect where the magician rips the corner of a bill, eats it, and then restores it back with his mouth or by putting it inside his mouth.
Starts at 18:08 (For those who can't seem to grasp what