someone who drinks so much soda (pepsi in perticular) they can't fit anything else but empty soda cans on their bedside desk
"dood WTF is wit all dis pepsi. ur gunna becuma pepsiholic"
A retard who has been sighted drinking Devil Juice (pepsi) on multiple occasions.
Jonny was drinking pepsi and saying nothing but "your mom" to people all week. I guess that this means that he has become a pepsiholic