his lips are so big that you can hear them slap together when he talks. his forehead is so big that if you touch it your hand be lost within his headtop. his head is so shiny and bald that if you rub it a genie will come out of his mouth. he eats grass

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.