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1.
A wishy-washy moderate Republican who supports liberal causes (e.g., Obamacare) out of fear that liberal newspapers like the Washington Compost will write bad things about him.
Buddy: Can you believe Republican Sen. X voted for Obamacare?

Slim: What a Repubic!
by Spicy Joker September 22, 2009
 
2.
A popular shopping outlet for rich chavs. Generally spelt Republic, it is pronounced 'Repubic' by anyone who has a good taste in clothes.
'I saw Nick in Repubic on Tuesday.'
'Nick who?'
'Can't say on here, it would be a full name.'
by Stephen W. Thomas May 09, 2005