Fuel collar refers to those either in the travel industry or who very regularly travel as a part of their job, i.e. door to door salesmen, field salesmen, airline pilots, etc. They spend the bulk of their time traveling, consuming quite amount of fuel.Fuel collar（油领）指那些就职于旅游行业或者工作经常需要出行的人，例如，入户推销员、区域销售员、飞行员等。他们大部分时间都在旅途中度过，会耗费大量燃油。由此得名为fuel collar。For example:Her boy friend is a fuel collar. He works for an airline company and travels a lot.她男朋友是个油领。他在航空公司工作，总是出差。