Someone who is amazing and beautiful in every way. If you get the chance to be friends with or date a Casper, you should hold them as close a possible and not let them go.
A common nickname for a 'evil' person or thing. This can also be used to describe an person who has become to symbolised with ghosts and ghouls and knowing them will haunt you for the rest of your life.
'I need to get away from you, before you become my Casper.' Shouted the girl with tears in her eyes before disappearing into the forest.