I've heard this a few times from my kids over the years. Yes, I'm 50 years old, but the thing is I don't use slang from the 70's when I was a teenager. I tend to use odd words and phrases, and I'm not sure why they stick in my head. Here a few examples of words or phrases I love to use, whether I mean to or not:
Giddy: to me there isn't another word that really conjures the same image that giddy does. When I won my Kindle a year or so ago, I was giddy, as in laughing, smiling nonstop, excited, doing a jig and just basically happy.
Jolly: No, not Santa, though he is certainly jolly. Babies or toddlers with rosy pink chubby cheeks who have conversations only they understand, then they laugh as if they told the best joke ever...are jolly.
My Cup of Tea: Yes, I drink tea, but I also use the phrase "It's not my cup of tea." I think I've always use this phrase;at least as long as I can remember. "Books on quantum physics are not my cup of tea, but give me a story with an alpha werewolf any day."
Tomfoolery: *snicker* Who doesn't love this word?
Shenanigans: Use it in a sentence and smile.
Dastardly: What does this word make you think of? I always think of a bad guy that ties the damsel in distress to the railroad tracks.
Dubious: When you have teens this word can apply to many things such as lame excuses, reasons homework wasn't done etc.
I love words:)