The mask-like device that a redneck diver or swimmer places on his or her face which allows them to see underwater.
Bubba: Hey , Brandi, you seen my underwater seein' glasses? I dropped my truck keys in the pond agin and gotta go look fer 'em.
Brandi: Yeah Bubba, they right there- on your big ole head.
Bubba: (reaching up and scratching at his big ole head) Well shut my mouth, they sure are! A yuck, yuck.