A dunderhead is someone named Willow Kedem Kaplan, Willo or Wills for short. Willow Kaplan attends dunderhead school for idiots
by anonymous November 1, 2020
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A simple insult which can be given to stupid people who takes the piss out of you or just generally super retarded.
by ACoolGuy1221 December 6, 2021
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Get the Dunderhead mug."That's a dunderhead move"
by sagesoup April 14, 2019
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Get the doo-doo dunderhead mug.someone who has a small penis and tries to suck it every night and cums out small amounts into his butthole. Likes to lick penis hole. When he is erected it shrinks even more than when soft.
by Keagan24 December 11, 2017
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