1) A somewhat sarcastic term used as a description of someone who is materialistic, shallow, high-maintenance, or just behaving in a generally Scottsdalian manner
2) a phrase used in response to a person who makes a stupid or shallow statement (i.e. someone from Scottsdale)
3) phrase used to describe a person from Scottsdale (see Scottsdale for more information)
1) Jim: Hey look at Madison, she just got fake baked and looks like a cheeto!
Paul: (Sarcastically) Wow she's so Scottsdale.
2) Kelly: Omg I went to the mall yesterday and I spent like $500 on this one purse but I can't find it. Oh well I'll just get two new ones on Saturday.
Cara: (deadpan) Oh you're soo Scottsdale.
3) Jayla is a spoiled little princess with orange skin and fried dyed hair who just got a nose job for her 16th birthday; she's so Scottsdale.
The phrase has indeterminate meaning and unclear origins.
Usage varies. It can mean cool; inebriated; "jacked" on stimulants; or "high" on benzodiazepines.
It can also mean all or none of these things. Proper usage varies with time, place, and context. However, the specific meaning intended is always easily conveyed, due to the common usage of the colloquialism.
Dave: What are you doing dude?
Berg: I'm just scoobying over here man.
Dave: Cool, I'll come over and we'll sort those bolts together.
Jack: What are you cooking Alex?
Alex: I'm making hotdogs.
Jack: That's so scooby.