The concept (or rather, thing) in Psychology that I believe I will remember in 5 years or so is the amygdala. Not only does it have a funny spelling, it has a lot to do with fear, excitement, and arousal. Plus, every time I think about Doctor Gewirtz, I will remember his distinct, accented voice saying the word "amygdala." For those of you who don't remember, the amygdala is defined as the "part of the limbic system that plays key roles in fear, excitement, and arousal."
I will remember the amygdala because I am bound to think about my fears in the future, and thinking about my fears will remind me of the part of my brain that gets activated when I'm scared or aroused. Now when I think of fear, excitement, or arousal, I will be reminded to psychology class and my dear friend the amygdala.
The final reason I will remember that particular part of the brain is because it is not a recognized word by Microsoft Word, which I found to be rather strange. Weird.