TIR stands for Transports Internationaux Routiers” or “International Road Transports.  TIR-owka then is  a lady that works in a service industry, that stands in a forrest, on the side of the highway, usually dressed in a very revealing and easy to spot from the distance  neon clothing ready to help the big truck drivers relax for a bit on the side of the road in exchange for some money.  This one even greeted us with a bird as we drove by with our camera in hand.  Welcome to Poland!