smegulate

smegulate (transitive verb)
1. Destruction or devaluation of something or of a situation through smeg, that is, through self-centered stupidity;
2. Ruining by intentional or unintentional contamination with smegma

"it's hard to share a bathroom with kieran, everything's all smegulated"

Legal

Adjective, meaning Bunk, ersatz, fraudulent, fake
Devoid of the virtues usually associated with that thing
Stepped-on, devalued, counterfeited, a swindle

I bought an eighth of pot, but it was legal, so ...