Collar

“out of COLLAR ,” i.e. , out of place, no work. Probably a variation of the metaphorical expre ions, “in, or out of harne ,” i.e. , in or out of work—the horse being in collar when harne ed for his work. Collar work is any very hard work, from the expre ion among drivers. Any uphill journey is said to be all “ COLLAR work” for the horses.