obscenely large sunglasses that cover up most of the face, worn to be "fashionable" or worn by a butterface to decieve men.
Guy 1: Hey, look at this dime piece over here.
Guy 2: Don't get to excited, those flasses gotta be hiding something.
Glasses that do not contain prescribed lenses, usually found on the shelves of your local Dollar General. worn by women who want to look sophisticated or cop out of putting on make-up/doing hair.
"check her out, she is totally sporting flasses"
"those can't be real, they are deffin. flasses!"