A polish railroad is when a male recieves anal penetration from two other males simultaneously. The motion of the act is perhaps the most important part. The two penetrating males move in and out in opposite motion meaning as one goes in, one comes out. The motion of the two males in junction with the two penises in the third males anus (the rails) is aptly named the Polish Railroad.
Cam took a ride on the Polish Railroad lead by his two conductors Bill and Luke in Nellie's bed last night.