The condition of having such a huge crush on someone that you completely forget how to do the simplest things.
Boy: You know we could have just used a different IM client to keep our private chats seperate from our work chats?
Girl: Jeez, we could have thought of that such a long time ago!
Boy: Don't worry, we have crush dementia, it's understandable.
by PiMPeRJ September 22, 2008
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To place various groceries in a shopping cart then forgetting where it's been placed or forgetting it all together and leaving the store.
Peggy went grocery shopping today and had a shopping cart full of groceries then some how forgotten them . Moments later people pass by and see said cart as they look on a clerk yells in regret and say "Damn Dementia Groceries !"
by K.M.O. March 23, 2023
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A loss of cognitive capacities which is both pervasive and unexpected. Usually only lasts one day.
I am afraid I've developed fecal dementia. I can't remember shit today!
by Topiltzin April 28, 2011
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1. For an unexplainable popage of a boner when looking at guys, after having an untarnished heterosexual reputation.

2. An excuse to cover up your gayness
Steve and Carl are about to get into the shower after a workout.

Steve: I really blasted my quads today man.

Carl: Those are nice....really nice.

Steve: Hey do you have a boner right now?!

Carl:(turning around) No! I have uh...erectile dementia.

Steve: Sure faggot
by Pearljammers August 9, 2009
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A temporary form of amnesia where a corporate employee retains no knowledge of previous conversations (particularly when involving benefits to underlings).

Most often seeing in managerial types, or those working in a corporate environment for a very long time.
Example #1:

Bob: "Remember in the meeting last week when my boss said I would be in charge of that new project? Well, I noticed Carl working on it, and when I spoke to my boss, she denied ever speaking to me about it."

Jane: "See-- it's that corporate dementia kicking in again."

Example #2:

Rick: "Dude, my boss just told me the exact same thing he said an hour ago-- must be that corporate dementia."
by Stephanie Tool March 13, 2008
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A psychological phenomenon that occurs when a male of the human species witnesses a gorgeously endowed female, and procedes to lose the ability to concentrate or focus on anything except her:

1. Tits
2. Ass
3. Legs
4. Tits
5. Face

In the case of Arkansas natives, may produce confusion about the definition of adultery, and lack of ability to use the word "is"
Man 1:Im sorry, what were we talking about? That blond chick that just walked by..

Man 2: With the knockers? Seems like you just had a case of penile dementia, my friend!

Man 1: Yeah, good thing we are at a titty bar. Lapdances are on me!
by Me February 27, 2003
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A severe mental disease which causes lesbians who can't come out of the closet to go nuts.
Joe... I'm telling ya, that old man hatin'bitch has lost her mind.

Rodney... Classic case of strap-on dementia dude.
by wmawnmo April 6, 2013
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