A person eats a bunch of sushi in hopes of getting mercury poisoning. Then when someone pisses them off the sushi-eater vomits all over their face, producing a sushi mask.
by Zoe & Seth October 21, 2010

When people blindly or religiously follow the directives of the authorities to wear a face mask at all times, as two barriers are debatably better than one—the sick person wears one, and the well person also wears one to protect themselves and others regardless of where they are in public at any time of the day, and whether they are alone or not.
Are these examples of mask mania? Cab drivers sitting in car by themselves wearing masks. People walking their dogs outdoors wearing masks, and nobody near them. People wearing masks at home, because they want to protect their pets.
by MathPlus June 16, 2021

by ThePhantomGoaltender October 20, 2013

To don a woman's panties over your face, so as to look like a ninja. Typically after she has worn them.
While I was fucking Laurie, I grabbed her panties and wore them like a ninja mask, gave it to her from behind, like a ninja!
by Wolf Whitman November 23, 2014

When you get sunburn on your face from working at or attending Keansburg Amusement Park/Runaway Rapids in Keansburg, NJ. Newbies to the park normally get them.
Person 1: "How was the boardwalk Keansburg?"
Person 2: "Not bad, but my face feels awful."
Person 1: "That's a Keansburg mask for ya', shoulda' brought sunblock."
Person 2: "I didn't think I'd get sunburn on the first day..."
Person 2: "Not bad, but my face feels awful."
Person 1: "That's a Keansburg mask for ya', shoulda' brought sunblock."
Person 2: "I didn't think I'd get sunburn on the first day..."
by duhhbri April 6, 2009

Prior to intercourse, the male trims or shaves his pubic hairs and keeps them. During sex, before the male ejaculates, he pulls out and ejaculates all over his partners face, and throws his pubic hairs at her. The hairs stick to the ejaculate, hence creating the image of a bear mask.
I bear masked your mother last night!! she spent the rest of the night picking hairs from her teeth.
by TheFreshmaker August 30, 2008

Something that is soo kick ass it can only be accomplished by one person. can also be used as an adjective to describe something that is epic or kick ass.
by Lizard Fuckhead bitch ASS January 8, 2009
