A job talker is either1 someone2 who only talks about their job with anyone3, at any time and in any place, and who has nothing better to talk about than their job, or someone who cannot sTOP complaining4 about his/her work whenever5 there is someone around.
Job talker就是那些无论什么时间、跟哪个在一块、在任何地方都只能谈工作的人，或者只须旁边有人就会无休止地抱怨工作的人，总之就是每时每刻不在谈工作的人。