An aggressively stupid person. A true
schmoe-donkey combines the hapless, clueless,
luckless qualities of a regular
schmoe with the stubborn, clumsy qualities of a class-A jackass.
"Who was that
random guy at the party?"
"You mean the one drinking all our beer?"
"Yeah, and
hitting on all the women, even though they told him to piss off... for like three hours straight."
"Oh, that guy? Yeah, just some
schmoe-donkey."