Trial size

When a man, very short, has an incredible case of "short mans complex". After arguing with said man throwing the term trial size at him, referring to his stature, should really drive home the point he's short.

Short man: hey, schmuck, move your car forward, I can't get into my driveway!!

Me: sorry, I'll move right now

Short man: you'd better!!!

Me: alright, calm down, trial size. I already said I'd move it.