Used to describe feeling an intense amount of positive emotions for the band Hall & Oates, but mostly to John Oates. Can include involuntary dance moves that involve running ones finger through ones hair.
Did you see that dancing when "Private Eyes" came on? He was Oatsing.

also

I am Oatsing to get the new Hall and Oates CD "Home for Christmas"
by Updawg December 18, 2007
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Person A: dude I'm really stoned.

Person B: dude I'm so oatsed!

Person A: Wow
by gravity_cat November 29, 2009
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