A sudden state of seeing or acknowledging only the good side of someone (or, more rarely, something) which comes upon realization that you are about to part ways with these
people.
The term apparently comes from high school or
college graduations, when all your classmates whom you've always considered to be
mean, stupid or boring all of a sudden appear to be nice, interesting and friendly.
Person one: I was going to break up with my girlfriend yesterday, but then I couldn'
t because she suddenly seemed so
beautiful.
Person two: Mate, that's graduation glasses.