When you've had anal sex with a dark skinned woman who has a voluptuous derriere or booty.
Where the dark skin of her ass cheeks and tight sphincter look and act as the Koozie, and the mans penis resembles the bottom end of the beer bottle going into its Koozie.
One Guido said to the other Guido, I Beer Koozied this bootylicious chick up against the wall in the alley outside the club last night, fist pump!!