Lack of communication skills ... trying to be "cool" ... who knows.
I call everyone "dude" Californian habits die hard?
No! Hahaha! I even call my mom dude sometimes.
I don't get calling a dude a dude, dude.
The word dude has had a cultural shift in meaning over time.
Cause their high?
'Dude' is an exclamation not unlike 'Holy cow' or 'Oh, my goodness'!