A ways of saying, "Whats up, dude," typically used by stoners and punk teenagers a like. A suhh dude can be used in any context.
Billy: A Suhh Dude?Shaggy: Not much man, just picked up some dank from the dispensary, want to burn?Billy: Right on!!
Dude suhh
As a greeting: "suhh dude!" Responded with "dude suhh