Like a smartypants, but smarmy.
That moron is such a Mr. Smarmypants.
An insult that implies the receiver is even lower than a dick: he is implanted in one.
That moron is such a penile implant.
An opinion or perception (usually wrong) that is stated as fact.
There goes that moron spouting his unfacts again.
A peon. An amalgamation of pipsqueak and little shit.
Look at that moron, he's such a pipshit.
An expletive that's pretty much meaningless.
What the blubberfuck is that moron doing?