A person Designated to stay sober and supervise people under the influence of Hallucinagenic Mushrooms. A Shroom Daddy is usually a close freind, or fellow drug user. People may take turns over the course of a week being the Shroom Daddy, in order to get their share of psychadellic fun.
When your friend thats tripping on shrooms buys a ton of stuff because he or she thinks they are a millionare. In reality they go over on their credit card and get a crappy credit scoreafter the trip.
My friend who thought he was a shroom dog millionare dropped his credit score from 760 to 430 in one trip after buying 230 bags of twizzlers.