When a man or woman eats extremely spicy food then waits at least 2 hours (or until they really have to poop) then has their partner take a lo mein noodle and stick it through one nostril and bring it part way out the other so half is hanging out either side reassembling a Mongolian mustache. The partner then takes the noodle hanging from their nose and tickles the others asshole until they shit all over their face. They then let the shit dry and keep the noodle in their nose and wear this as face paint to a social gathering.
"Hey Thomas I really like your face paint you wore to my daughters birthday party!"

"Thanks, Kelly gave me a Mongolian facemask."
by DaxTheDestroyer April 8, 2016
Get the mongolian facemask mug.