Back when I was fourteen, I spent a day at my current school to see what it was like there because I was thinking of applying. My mom had packed a brownie in my lunch. When I took it out at lunchtime, one of the students asked me if it was a "special brownie".
Being an idiot, I got a big smile and said "Yeah! My mom made it for me!"
Everyone in the room gave me an absolutely horrified look.
Fast forward to early 2012. I've been attending this school for two years now, and I'm talking to my best guy friend before class starts. Somehow, we get on the topic of our favorite sweets, and I mention this story to him.
He breaks down in a fit of laughter that lasts a long time. I ask him what gives once he finally stops laughing.
"Loon, you do realize 'special brownie' is slang for a brownie with marijuana baked inside?"
I remember one specific instance where I was with him while he was picking up something from one McDonald's to take to the one he works at, and he noticed they had better equipment. He made a joke to a crew member that he felt "depraved" even though he meant "deprived".
Well before I thought I did know, but because I only ever knew what "power bottom" was from a friend telling me, I thought it might be fun for shits and gigles to see if it was the same thing on urban dictionary.
Once in high school my teacher made some joke about if she had to go to prison. I almost said that I'd pay her a conjugal visit, thinking a conjugal visit simply meant a visit to someone in prison (which is what it actually means). A little while later, like maybe that same day when talking to a friend, did I learn that in modern society sex is totally implied in the term. Luckily someone interrupted me before I could say that shit to her.