s, o, d, f, u are letters that make 'doofus'
DO, do, US are words within 'doofus'
1 possible definitions for 'doofus'
Under this definition, doofus is a noun and has the following properties:
dimwit, nitwit, half-wit have the same meaning as 'doofus'
'doofus' can be a type of simpleton, simple.
'doofus' can be a useage of colloquialism.