100 dollar bill. It is called a c-note because "c" is used to represent 100 in Roman Numerals.
I'm about to drop a c-note on this bitch.
When a fat white kid, crip walks past you with a female outside...
If I ever see Herman C-Note Truffle Shuffle with his younger sister, I'm gonna push his fat ass into parking lot traffic, film it, and show it to my dealer.