The feeling one gets when they have eaten copious amounts of food.
Different from when you eat so much, typically unhealthy, food that you get sick.
Easily identified if a person has a very relaxed and cloudy look after eating.
"Mmm...very good." *yawns*
"Damn he must be hella overglazed."
Something that isn't overrated at all since it's still great, but gets put on such an unreasonably high pedestal compared to other things of its nature.
John - "Madvillainy clears that bullshit Illmatic that album is the greatest of all time!"
Nathan - "Madvillainy is great but that album is so overglazed, it isn't that far ahead of other classics."