Barbecue sauce
A sauce used to baste barbecued meat; also used as an accompaniment to the meat after it's cooked. It is traditionally made with tomatoes, onion, mustard, garlic, brown sugar and vinegar; beer and wine are also popular ingredients.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.