casual beeping 

the act of hooting your horn at random and unknown other vehicles for amusement. The amusement may come from performing the act itself, or, from laughing at the expense of the victim who is unaware as to why they have been beeped.

Let's engage in some casual beeping!

casual beeping by PJS01010 March 23, 2011

Casual beeping 

The act of casually beeping your horn when you see a bus insight then carrying on as if nothing happened.

sees bus
CASUAL BEEPING BEGINS..
BEEP
BEEP
foot to floor and offffffffffffff

Casual beeping by scoopdapoop March 22, 2011