Something interesting I came across, not sure how true it is, but it's entertaining so I'll post it here
ORCHID
What It Means Now: A type of flower.
The Dirty History:
At some point in history a botanist was looking at what is widely considered to be the most beautiful flower in existence when he noticed that the roots sort of looked like balls.
It's unknown if he held the flower next to his crotch, pointed and laughed, but the observation stuck, and the plant was named for a ball-joke.
The term orchid comes from the Greek, orkhis, which means testicle. This etymology of orchid makes the White Stripes lyrics, "You took a white orchid and turned it blue" make much, more sense.