Noun/Adjective: A word used to describe someone that's entirely stupid in their actions or the way they go about things. Devoid of all common sense, a dumbaclart is someone who doesn't realise their mistakes until they have already made them.
Alex: wait what was the homework again?
Jack: Did you not listen to Mr Chan? Find out yourself you absolute dumbaclart.
by triggytriggy July 19, 2019
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