Learn how to distort text and have it take on a certain shape, a shape that you can define.
Using the Type tool, type out some text.
Using the Pen Tool, draw a jaggedy path around the text you just typed.
Select both the text and the jaggedy path and then go to Object > Envelope Distort > Make with Top Object.
Your text will take on the form of your jaggedy path! Enjoy!