from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A small square cardboard mat, often with an advertisement for a brewery on it, that is used to rest one's glass on, and to protect the surface of a table or a bar in a pub.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a drip mat placed under a glass of beer
Sorry, no etymologies found.
Well, sure— Devaney reached for a beer mat and produced a biro to scribble down a phone number.