The inability to accept that words are spelled correctly or incorrectly due to the obscene diction or the even more obscene length of an essay, term paper, dissertation, etc.
You know how, when you do something embarrassing, there always seems to be a hot guy/girl around to witness it? That's shame goggles in action. Under normal circumstances, the person would be average, decent-looking but not extraordinarily hot. But because you have just embarrassed yourself, your brain makes them hotter to amplify your shame. The more embarrassing the blunder, the hotter the person will become.
Girl 1: I can't believe that hot guy just saw me step in dog poo!
Girl 2: He's not that hot. Take off your shame goggles. And wipe your shoe.
1a When the uppermost of the two sexual partners engaging in the classic 69 position, defecates on to the other participants face. The true 'mud goggle' effect isn't reached until the stool droops over covering both eyes.
2a when your friend makes a potential mate out to be less attractive than they actually are, because of foul mood -they are said to be wearing "mud goggles"
a. Steve gave Martha some awful mud goggles last night, he probably wont ever see her again
b. Jessica sure was attractive, but mark said she was a real shovel face poor guys wearing the mud goggles tonight.