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> 平民が、貴族にそんな口[利]{き}いていいと思ってるの.

Above is the full sentence from a book I'm reading. I get いいとおもっている part =
think its nice (roughly), and already looked up 貴族に, そんな口利き, but the sentence
as a whole makes no sense at all to me. Please help, and thank you.
CC BY-SA 3.0
2014-08-21T15:30:57.967
18337
2014-08-21T16:52:35.227
2014-08-21T16:49:36.920
4402
question
grammar
break down ~いていいと思ってる
You can parse it like this:

> （平民が、貴族にそんな[口]{くち}( **を** )[利]{き}いて(も)いい）と、思って(い)るの？

I think it's like "Do you think that 平民 is allowed to talk to 貴族 that way?"

そんな modifies 口(≒way of talking).  
口を利く means "to speak, to talk".
CC BY-SA 3.0
2014-08-21T16:47:31.583
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2014-08-21T16:52:35.227
2014-08-21T16:52:35.227
18337
answer