Notekin
A napkin of any size, shape or color that is used as am immediate notepad, sticky or post-it type note. It is usually used in a bar or eatery in response to an urgent need to write down a telephone number, name or other item of interest.
Eric (while on the phone in a bar): I have a pen. Wait, I need to find something to write on to get that number.
Chrissy: Here is a notekin, just don't wipe your mouth with it after you write the number down.
Chrissy: Here is a notekin, just don't wipe your mouth with it after you write the number down.