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When you inject Heroin, and it turns your blood a brown, muddy colour.
"Ahhhh man.... I just had mudvayne"
Abbreviation used in the porn industry for double penetration shot (i.e., simultaneous vaginal and anal sex on film).
If it's what you're looking for, you can find a section of DPS pornos at the adult video store.
originates from being under the influence of ketamine, but is accepted in generalized terms as being fucked up on pretty much anything, not just k.
dude, i am extremely k-rocked to the max.