a guy who doesn't know what he is doing and grunts
This guy is an idiot
I am that.
I am an idiot
Idiot means someone who is a knuckle head or perhaps Lad47
Your such a fucking idiot.
Donald Trump
Search idiot on google and you’ll see why
You
Hey, you’re an idiot
Someone who lacks sense
look at that idiot over there
The person next to you
Who is that? That's Idiot!