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2.
short form of writing smart ass.

*As the creators are currently pursuing their profession in their study fields ,their tend to write out in capital letters.
Girl:Am i a SMASS??

Boy:No,you are not a SMASS.
by Lex & Vince January 19, 2008
 
1.
The Act of rubbing the sweat from your ass and then smacking someone in the face with the same hand.
John: Look out its a Smass attack!!!!
Joe: AHHHHHHHHH!!!!!!!
by Popwar January 14, 2005
 
3.
1. The Binefaust language's slang for the plural of smack (meaning Heroin).
2. A Heroin addict.
3. Someone who participates in the listening of makina rave (located in the north-east of England).
4. A chaw (or chav as some smasses like to call it).
1. Lol@dazs smass, eirt vhielll one smass! ( Binefaust for haha look at that smass, they are one hell of a baghead)
2. Oh my god, you should have actually seen the state of this Smass that was down the dole office!
3. Fuck's sake man I'm pure sick of all of this Smass rave people are blaring on their gay arse phones.
4. Hahahahahaha seen the state of that little Smass, fucking prick.
by Een King December 23, 2006
 
4.
The new world word for the item normally called grass.
That smass is really green today!
by MAGIC October 10, 2005
 
5.
Shortened form of smart ass.
Omg, you're such a smass!
by TheGreenPixie March 02, 2005