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1.
A portmanteau of the names of the 2008 Republican presidential and vice presidential candidates: John McCain and Sarah Palin.
"Brangelina. Richandamy. Now . . . McCalin."
by Portia of Belmont September 12, 2008
 
2.
A combination of two sub-standard persons or items in an effort to make them appear more worthy of someone's attention.
They make a bad couple - he can't count and she puts lipstick on dogs; they're such a mccalin.
by Andy Pants Face October 15, 2008