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1.
(ble-thir)) Dalect Cheifly Scot.- !. person who chatters incessantly; someone who babbles on and on ("That wee yin o' yours is a bleather mouth yea").

Reference: Spirit Design
"Oh for hevens sakes your just a wee bleather, talk, talk, talk, talk!"
OR
"all you do is babble your such a bleather"
by MCMB May 06, 2007