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1.
Alternative body art. Creating art on the body as someone, often your partner, scats on you.
Billy: Hey Doug, check out my Mickey Mouse Scattoo that Linda gave me last night, it's awesome.
by Jimbo J November 12, 2007
 
2.
(n): a combination of the words “Scary,” “Scar,” and “Tattoo.”, Luckily the word “Scat” also emerged from this hybrid, which is another word for Fecal Matter. (”Shit”. . . for the vulgar lay-person!)
That tattoo is so bad that its not even a tattoo... its a SCATTOO
by jinji October 13, 2009