A fork of Rural Dictionary
Defaultation basically translates into, "Duh, it's a known fact. Default. Obvious?" a) Used when an observation is brought up that is either so obvious that it was stupid to even bring up or b) Used when wanting to affirm the fact brought up--in this case, used as a compliment or an insult. An exaggeration, either way.
Corresponding to... a) Jon: I am a boy Maria: Defaultation. b)Maria: I'm cool Jon: Defaultation.