A runster is a cool, totally rad person who runs; for fun, fitness, weight loss - it don't matter. Long distances, short distances, slow or fast running in it's pureness.
by The Running Dude February 13, 2014
Runster is a word that the beloved Hannah Barbara cartoon character “Scooby-Doo” pronounces the word “Monster”,
by Dozy_Leo November 10, 2019