From Wiktionary, the free dictionary
Created on the same principle as o_O , but using a Unicode character which more closely resembles an eye with an eyebrow (ಠ Kannada codepoint is U+0CA0).
ಠ_ಠ
An emoticon representing a look of disapproval .
2012 March 29, Nathan Rice, “Re: Number of languages known [was Re: Python is readable] - somewhat OT”, in comp.lang.python [1] Usenet ; in English):Damn, then I'm not trolling hard enough ಠ_ಠ
2013 June 11, Rick Johnson, “Re: "Don't rebind built-in names*" - it confuses readers”, in comp.lang.python [2] Usenet ; in English):PS: Excuse me whilst i brew myself a nice cup of HEMLOCK TEA!!! ಠ_ಠ
2014 June 3, {~_~}Раиса [ username] , “Re: 300 scientists can't all be wrong on oil pipelines, Harper .. . .”, in mtl.general [3] Usenet ; in English):But I'm always right when I imply you're an idiot that likes baiting female posters - while reluctant to go play with the boy posters. ಠ_ಠ
For more quotations using this term, see Citations:Unsupported titles/ಠ`lowbar`ಠ . 
