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To spread dirty tracks or footprints across the surface of something. A noun or pronoun can be used between "track" and "up." Why on earth did you think it was a good idea to ride your bike through the house? You've tracked up all the carpets from the front door all the way to the back yard. The dog bolted into the house and began tracking the floors up with muddy paw prints.
track something up
to mess something up by spreading around something dirty or messy with one's shoes or feet. Please don't track the floor up! Claire tracked up the floor.
1. To cover some surface or area with tracks: The kids tracked up the carpet with mud. In the morning, the newly fallen snow lay prettily, but by the afternoon, people had tracked it up.
2. To move north along some path or geographical feature. Used of storms: The storm tracked up the coast.