to rant incoherently; to puff oneself up with outrageous claims as to one's abilities and assets; to spiral into a hallucinogenic haze of addiction-fueled denial; to do any of the preceding in the public eye
I thought Miss X was the one celebrity could handle fame, but it looks like she's really pulling a Sheen.
by sarhar68 March 2, 2011
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1) Winning, duh.
2) Winning, despite the fact that everyone thinks you're going to lose.
3) To think you're winning, when every one else knows you're not.
4) Under the influence of a drug called Charlie Sheen, which has traces of Tiger Blood and High Priest Vatican Assassin Warlock in it.
5) Anything Charlie Sheen says or does.
1: "Dude, I'm sheening right now."
2 and 3: Narcissistic people tend to be sheening in their opinion at all times.
4: "I was going to go home last night, but I was sheening so hard that I thought that my dog stuffed it in your mailbox."
5: "That Charlie Sheen, he sheens like a pro, I have never seen someone who takes sheening to a level that innvolves so many drugs and hookers until last night."
by theagerrity March 26, 2011
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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 7, 2011
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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 2, 2011
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Making your drug-induced psychosis as painfully public and humiliating as possible while thinking you are showing how cool and clever you are.
Man, George Bush was such a Sheen!

I was sheening for a bit in the 90's but now I'm cool
by Sheenburger March 10, 2011
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When undergoing the abuse of 3 or more illicit drugs in an evening or anonymous sex with a variety of women.
Dude im totally Sheening my balls off right now!

OR

Aww man, did you Sheen those whores you came home with last night?
Oh yah they got sheened the shit out of.
by nonyabizniss March 28, 2011
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