A person who rides any two-wheeled motorized vehicle(scooter, motorcycle, etc.) without a helmet. The word comes from the flower arrangements placed on the side of the road where a deadly accident occured.
"Dude! Did you see that guy in the motorcyle? He had to be going at least a hundred!" "Yea, I also noticed he was wearing jean-shorts and a tank top with no helmet. Regular Roadside Bouquet.
Any situation that you normally would not over-react to, but since you're already under a lot of stress from other situations, you blow it out of proportion.
Why won't this DVD play?!?!?" "Dude, take it easy, it's just a movie." "I know, I'm sorry. I've just been under a lot of stress with work and my girlfriend, and this was just another nail in the coffin. No biggie, just a jar of pickles.