A Pipe Rat refers to a person who spends an stupid amount of time in the half pipe snowboarding or skiing.

Snowboard Pipe Rats are easily spotted by their tall tee's, pants hanging half-way off their asses, dude-speak, and the inability to ski or ride on the big mountain. Exposure to Pipe Rats can lead to decreased ambition, severe dude-tude and a general lack of skills on the rest of a ski hill.