(Basically it's rediculously legitimate.) It's so extremely legitimate that only adding another adjective can help you explain the intensity of what you're talking about.
1. Alex
2. Being so poor that the only way to bring in food and rent money would be to donate plasma...which is rediclegit.
a combination of the two adjectives rediculous and retarded. Used when something is not only rediculous, and not only retarded, but a combination of both.