a beer bat is a plastic
whiffle ball bat (can be bought at a WalMart or another store like that...or you can steal it from a lil girl if she's not playing with it at the time). The bottom of
the bat (where you hands go) is cut off. You proceed to pour a beer into the bat. You then put the bat to the floor, your head to the bat and spin around 10 times. After your tenth spin, pound the beer from the bat.
Also known as the
ULSTER beer bat.