Another term for awesome, cool, uber sweet, totally legit, and just plain out sick nasty. Invented in 2010 in a coffee shop in rural Roanoke, Virginia, it is possibly the most effective word ever used. Not only is shwangadoo a cleverly usable adjective, it can be used in many situations.
Example: Dude, those new shoes you bought are so shwangadoo!
Did you watch that video about the guy who stabbed that kitten? I wish i was that shwangadoo...
The act of masturbating an hour before pre-prom in hopes that it will prolong your sexual experience after prom.
hello mrs. smith, ill try not to have your daughter back to late, but i cant promise. my Prom-a-shlonga-ding-dong might have you waiting an extra 3-4 minutes