to go utterly bat shit unexplainably, epicly, usually in front of a large audience

to do something over the top crazy as Charlie Sheen would do
Dude, I had to dump her, she started sheening just because I slept with her sister
by this_guy_ March 02, 2011
Measurement: a briefcase full, normally used with drugs(esp. cocaine)
Friend 1: "Hey dude, wanna go do a Sheen of coke?"
Friend 2: "Are you crazy? That'll kill you... Only Charlie can handle a Sheen"
Charlie Sheen: "That's just how I roll..."
by Insect Overlord March 07, 2011
(Adjective)to be sheen is to be cool, hip, happening, ]clean cut], stylish, stellar, excellent. A word most recently used in londons west end to describe someones social status or describing a comment, situation, person place or thing
That new restaurant on Old Compton street is so sheen!

I can't believe John treated us all to dinner that is so sheen.

That's a sheen pair of shoes you have there.
by drewbygp May 31, 2009
To overdose on drug usage like Charlie Sheen.
Watch out dick... don't make me sheen
by The Sheen March 27, 2011
(verb): an action or characterization(s) of oneself when on a few “Jeffery’s” to induce a full on cosmic-warlock-multi-dimensional-mind fucking good time. Which results in the restructuring of ones DNA?
Yo last week we were all winning the situation! we had Multi-Jeffery’s mixed with medicinal/recreational accoutrement and what we’re calling the “Eden pie” got us all fucking sheen.
by Styledogg March 22, 2011
To freak out or act bizarre.
Bob sheened when he heard the news.
by Cinamongurl March 18, 2011
To sheen (verb) - to perform an action that people would generally consider bad while wanting to convince everyone else, and often yourself, the action was a great thing.

The word comes from the standard practices of the celebrity Charlie Sheen. His ability to convince himself that the downward spiral of his life is living life well, and his attempt to make others believe that the downward movement of his life is really a good thing is the inspiration of the word.
Usage - “He has to know that calling his boss bad names is a stupid thing to do, but he acts like it was great. He was just sheening.”

“I failed my test so I’ll have to sheen the whole episode when I tell my parents.”

"His life is a mess, but he's sheened it well."

How does one actually go about “sheening”? There are very particular strategies. Here is one a person can employ:

Person A: “do you really think it was wise to smoke that 7 grams of crack?”

Person B: exemplifying the perfect sheening strategy in the following reply: “Duh, winning.”
by dNatch March 13, 2011

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