1 definition by Baylee&addison m8

treadmilk is created when sweat from the person on the treadmill mixes with their foot grease, and gets caught in the treadmill. Later, it is then turned to sludge,{which is the treadmilk} and once consumed it creates a healthy diet of treadmilk which is incredibly healthy!
Guy 1: *phew!* it takes me forever to get slim with these regular diet drinks.
Guy 2: well that's why i used treadmilk!
{PS don't actually try this}
by Baylee&addison m8 October 14, 2017
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