To be loyal to one organization or company for a long time, only to abruptly switch to the opposing organization or company.

Named for PA Senator Arlen Specter who switched from Republican to Democrat after 20 years as a Republican.
Bob: Did you hear about George?

Phil: No, what happened?

Bob: George was caught pulling a specter. He just traded his Impala for a Ford Taurus.
by tyleraw July 18, 2009
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When you abandon your party, and join the oppisition.
Dude I can't believe Jimmy is going to leave the GOP and become a dirty Democrat, he really is going pull a specter.
by Blic43 April 28, 2009
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