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Similar to McRetard. A Mcdonalds employee.
Went to McDonalds yesterday, it took ten minutes for my order to come through and the McSpastic still got it wrong!
McSpastic by McSpasticssaywhat July 25, 2011
Related Words

mastastic 

adj.

When something is so good you could jank to it.

Also, a really amazing masterbatory session.
Christ, you see that short skirt? Bitch be mastastic son!

I know, I had a mastastic jank sess to her the other night, I'm still sore!
mastastic by jimmy patrick February 19, 2008

McPlastic 

Someone who's less than 50% Irish, who's closest relative actually from Ireland is their great great great grandfather/grandmother, who goes around saying they actually are "FULL IRISH" or "Irish". Usually residing in Canada and America. They have no culture ties to the country, and usually do not have an Irish first, middle or last name. They usually do not even look a little bit Irish, yet think they are. They have never been to Ireland, and know nothing about the country.
Unlike myself and many others that have a parent or grandparent and have been to Ireland and have cultural ties, which makes the REAL irish descendents in America and Canada pissed off. Even the Real Irish such as myself do not go around saying I am "full Irish" because we are not. My mother is from Ireland and I was born in North America, which makes me North American with Irish descent.
McPlastic: Jakob goes around saying he's Irish, when really he has a Swedish last name, and does not know anyone in his family who was actually from Ireland.

Look at that faggot wearing "made in ireland" shirt. His great great grandparents we're maybe from Ireland, doesnt give him the right to say he's Irish.
McPlastic by TheTrueMick123 July 19, 2011

myspastic 

bob is the biggest myspastic i've ever met
myspastic by bboyhobbit October 15, 2006

Myspastic 

When a person is constantly changing their myspace profile, posting new bulletins, or updating their status and mood.
JESS. Why are you still online? It's way late, girl.

ALLISON. Because I'm fixing my profile.

JESS. Wow. You are totally myspastic.
Myspastic by Gingersnap007 April 17, 2009
Extremely amazing to a point where it is annoying
That dude's Haircut is Mctastic.
Mctastic by D-R-A-K-E March 27, 2008