1. to pass out or sleep on a mattress that is not the one you normally sleep in;
2. often involves sleeping on a mattress placed in a bathroom or shower room;
3. often involves the process of puking, peeing, or crapping yourself, or a combination of the three--also known as the trifecta.
1. the location of the zookie;
2. usually an old mattress only suitable to sleep on when blacked-out.
When someone gets too drunk to sleep in their own bed (for fears of dirtying it), a friend would lead him to a zookie mattress, where he is free on any normal inhibitions, and may soil himself as he pleases. The mattress can simply be hosed down the next morning.
to insert one or more fingers into another's bunghole
Justin's girlfriend just shoved her hand up my butt. Son, you just got zookied!