Anything you put your cock in to keep it warm.
Her asshole made an excellent cock sock to keep me Willy warm.
"Lemme slip on my cock sock so I can slip it in your pussy."
BBC stands for multiple things and can be used for multiple uses, this one Stan’s for Big Buchanan Cock. People with names that start with a are more attracted to it then most.
Big Buchanan Cock. Big and strong, usually sticky at times.