Definitions: Need a Napkin

Need a Napkin (V. phrase):

1) To realize you need something just before it is brought to you.
2) To give off the air of an unspeakable request.

Here ya are, you looked like you needed a napkin. Those ribs are messy. Can I get you anything else?

Hey there, baby. You need a napkin? You're drooling. Come on in the backroom. Sugah knows what you want.