to physically (and/or brutally) beat the crap out of some one.
Matterazi: You terrorist son of a whore!

Zidane: I'm gunna smack you upside the head bitch!

(Materazzi now has a gaping hole in his cheast, world rejoices.)
by cha ching July 13, 2006
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A Smack Head is someone who is always off their head on drugs, they don't have a job and they get the money for the drugs from benefits, these people are known as Smack Heads
Person1: Honey, our money has come in from the benefits
Person2:YESSS, LET'S GET FUCKING MENTALLLLLLL

They go and buy some crack cocaine

Smack Heads.
by SPICEMAN20002 January 9, 2015
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Someone called farah who loves to be a smack head on a daily
by Coleslaw/hummus October 14, 2019
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An incredibly simple and easy to prepare meal. Usually consists of oven fried chips (curly ones may be a step up) and a processed chicken fillet breast (25 mins on Gas mark 6)
"Whats that you're eating there James"?
"Just curly fries and a processed chicken fillet"
"Oh right, a Smack-head meal"?
"yer"
by Rob1412 March 14, 2011
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