The word has
two meanings
As an adjective , It is usually used to depict somebody's
stupidity or the suspiciousness of having mental disabilities
As a pronoun , it is used to refer somebody especially named
Aidan for acting childishly and absurdly as an insult.
Matthew was said to be an aidumb person because he
broke the
computer.
Aidumb , the kid with mental disabilities, is coming.