I'm guessing that many of these trendy-at-the-time words must have gone out of favor almost as suddenly as they appeared. My word is "bouffy" and relates to looking like a bouffant hairstyle. Since the bouffant is long out of fashion, the word probably died around the same time.
Equally interesting are words that have become obsolete. For example, a few weeks ago I was getting my hair cut by a young lady in (I'm guessing) her early to mid 20s. Somehow I happened to use the word "gobbledygook" in conversation. She just looked at me and started to laugh. I asked her what was so funny, to which she replied "Gobbledygook. I've never heard that before. What does it mean?" So I explained it to her.
She said "That's a fun word. People should say it more often."
I didn't want to tell her that people used to say it all the time when I was younger.