A bad friend, someone stabbing you in the back in public, highlighting negative sides about your character or just a douche.
On IRC.
#1: THERES PORN ON THAT LINK YOU GAVE ME
#2: So?
#3: Some people have problems with intimacy
#1: I googled that word, intimate or whatever
#2: You didn't know what intimate means?

Person #2 would be the Antimate in this case, highlighting the fact that #1 did not know the meaning of intimacy.
by Makeybussines March 23, 2009
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A very dull and boring person.
That guy is so antimated, I can't concentrate when he's talking to me because I am so bored.
by CharlieD May 18, 2008
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