The act of putting semen all over a person's body.
guy 1 : Yo dude join my Minecraft server
guy 2: hold on dude I'm getting mummified
Have anal intercourse, when finished, use a towel or toilet paper to wipe off your penis. For the brief moment it is covered in cloth, it has been mummified
Bro did you get mummified last night?
Hell yeah! Jenny is a freak!