A person obsessed with gadgets, electronics, and other technological devices
A person who has a smartwatch that also doubles as his housekeys, TV/Garage remote, and can control his toy drone could easily be described as a gadgemetronical fiend...
Police slang... Basic identifying information (name, DOB, address) is called "pedigree" information... Individuals unwilling/unable to provide such information have no "pedigree"... Hence, "Mutts"..
Sergeant: Did you get the pedigree on the drunk in Cell 3??
Patrolman: Naw, he's out of it... He's a mutt...