What does 420yolo.com mean?

420yolo.com meaning in Urban Dictionary

it is the reincarnation associated with Gifura Jeff flash picture. It's a jump scare of Creepypasta Jeff The Killer with a flash image for the initial photo going from abstract to normalcy quickly, a loud shout sound playing. NOTE: For those who have epilepsy usually do not search it. It will probably surely make you have a seizure of some type.