1. A man who does not need to bend over to suck dick.
2. A gay midget
"that fucking grundle runt ran between my legs"
grundle runt
by Rhodotracker November 29, 2014
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A: That midget is gay
B: that's a grundle runt

grundle runt
by Rhodotracker November 29, 2014
Get a grundle runt mug for your coworker Bob.