When you're playing chess and you take so long thinking about what move you're going to make that you end up making an idiotic move you spotted in the first 5 seconds but forgot about later on.
During a game of chess, after thinking about his move for 20 minutes ...

Ryan: Ah ha! Eat that! You have been had my friend.
(Jon swoops in and takes Ryan's queen)
Ryan: (Gasp)
Jon: Looks like the ol' Chess Alzheimer's got you again. Checkmate, fool.
Ryan: (Tears up)
Jon: It's okay man. Let's go watch Upstream Color. It'll cheer you up.
Ryan: No thanks, I like stories that are actually good. You know, with a beginning, middle, and end. Fuck that $hit. I'm going to play Halo. (flips chess board and leaves with dignity)
by RhInO May 18, 2013
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The effects of marijuana usage that remain for a time after the high has worn off, such as forgetfulness, lack of motivation, apathy, and general emotional fucked-uppedness.

Not noticed so much in occasional users, but very obvious in those who buy Zig-Zags by the case.
Herbal Alzheimer's looks like Tommy Chong at his peak before his first weed of the day.
by da Graybeard August 6, 2009
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The daily route from the retirement home to nearby locations taken by senior citizens who ride their motorized carts.
Old lady O'brien rode the Alzheimer's Express all the way to the corner store.
by Nailo April 28, 2005
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An alcohol induced state of memory loss. Individuals in this state are often seen wearing beer goggles.

Symptoms of Alcohol Alzheimer's almost always include very little or no memory of possible participation in interesting or extraodinary events.
Oh my gosh, I woke up naked this morning and have no recollection of what I did after the 15th beer last night.

Is that jang in my mouth? Did Mike and I eat a burger before passing out? Snap...if I wasn't suffering from Alcohol Alzheimer's, I would remember that yummy burger!!!!
by Uhohfosho July 23, 2009
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You suffer from this disorder when you don't remember a person, who is trying to add you as a friend on Facebook, and they remember you from a past school or job.

Typically speaking, you two are bound to have at least a few mutual friends as the only evidence on Facebook that you know each other.

The only known cure for Facebook Alzheimer's is to look up the person in a past school yearbook as a way to jog the memory that is encapsulated somewhere in the hippocampus. It best to do an yearbook lookup reference ASAP, before the forgetfulness gets any worse.
Monica: Hey Ross, I don't remember Charlie from high school at all.
Ross: Hey Mon, he's like the only guy who noticed you when you were fat.
Monica: Well, now I'm hot, all guys notice me.
Ross: Well, I would have to say that you are suffering from a disorder syndrome known none other than Facebook Alzheimer's.
Monica: O no, I got to get my yearbooks out of my closet and try to jog my memory, as soon as possible.
by FriendsFan2007 June 9, 2009
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If you remember somebody from earlier in your life and your supposed friend does not remember who you are or how you know them, then that person has facebook alzheimer's.

Basically, it is somebody who does not remember you, but you remember them and you want to be facebook buddies.
Joey: Hey Chandler, Gloria doesn't remember me from high school. She wouldn't agree to add me as a friend on facebook.
Chandler: Well, how do you remember her?
Joey: I like slept with her three times.
Chandler: She probably has Facebook Alzheimer's.
Joey: How come girls suffer from Facebook Alzheimer's more often than guys.
Chandler: It's because of lower brain capacity in females; well, you see, when girls go off to college, they have to make a choice - either remember past sex partners like you, or gain further knowledge in their college major.
Joey: Very intriguing.
by FriendsFan2008 June 2, 2009
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Just as a document created with a new version of a software cannot be read by the older version of the same software, extremely old documents sometimes cannot be read by the new versions of the software that initially created them. When this happens in a company such that the company cannot access its own aging data, the company is said to have corporate alzheimer's. The term was coined by chief open source officer Simon Phipps of Sun Microsystems while advocating the creation of a baseline standard for documents that would ensure that old data remains accessable.
Boss - "Johnson! I thought I told you to have the 1992 annual report on my desk this morning! Where is it?"
Scared but blameless employee - "Not my fault, sir. The document won't open cause it's too old. Looks like we've got corporate alzheimer's..."
by chilli weasel December 19, 2005
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