stickybuttcheeksXD's definitions
An utter idiot or buffoon; a Grumbis will win in any competition for the lowest IQ, and it will misplace your food items if gone unsupervised.
by stickybuttcheeksXD June 4, 2019
 Get the Grumbismug.
Get the Grumbismug.  Get the Grumbismug.
Get the Grumbismug.