Basic Beer Mop
Anything from Texas brisket to Boston butt will happily lap up this brew. 
12 ounces beer (bush works great but a dark will add a different flavor.)
l/2 cup cider vinegar 
1/2 cup water 
1/4 cup oil, preferably canola or corn 
1/2 medium onion, chopped 
2 garlic doves, minced 
1 tablespoon Worcestershire sauce 
1 tablespoon Wild Willy's Number One-derful Rub  or other dry rub or seasoning that complements the flavor of your dish
Combine the ingredients in a saucepan. Heat the mop and use it warm. Makes about 3 cups.
you can add other things to this.BUT..it's pretty good just like this.I normally add a tablespoon of black pepper both course and fine grind.and a 1/4 lb of butter..the good stuff.
this keeps what ever you are bar ba quin moist..hmmmm good..