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Someone who is a sanctimonious asshole. Usually a politician.
Example 1

Voter 1 - Wow listen to that holier-than-thou candidate talk about finding religion, even though he cheated on his first 2 wives.

Voter 2 - Yep, he is rectumonious.

Example 2

Candidates who preach "do as I say, not as I do" are rectumonious.
by Yankees Girl February 29, 2012
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