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1.
If you followed this link from the word nasty ass, this person is a moron. It is spelled buttocks, blockhead, and it is the anal region.
The idiot who started this word and didn't define it is stupid, but even stupider, he spelled it wrong.
by Douchebag March 09, 2004
 
2.
An instance where someone has had botox on their forhead area but the muscles have contracted (then been frozen in place), forming a verticle frown line, much like a butt crack. Hence buttox.

Pronounced: Butt - oxe
Oh swet Jesus! That chick has buttox!
by Cassandra Nilsson August 02, 2007
 
3.
The fancy British way coined to make the term"ass" much less offensive.
When the old British people got angry at how people kept using the word ass a lot, they ruined the word and changed it to Buttox.
by gartscrapper1 January 03, 2012
 
4.
booty enhancement by injection.
"OMG! can you believe how big her booty is? I hear she got Buttox injections!"
by Spinazi February 18, 2010