The monster who comes into your room at night and cuts the sleeves off of your t shirts to feed on. He usually only strikes those who who have biceps they often show off, are obsessed with themselves, sweat through the armpits excessively, or dont like sleeves. The sleeve monster is a very elusive, seemingly non-existent creature who wants nothing but to eat your sleeves.
-Dude, why do you always cut the sleeves off of your t shirts? You look dumb
-Sleeve monster man, he comes by like once a week lately