The art of posting sub luminally anti-Semitic memes on alt-right image forums for comedic effect. Merchant in this instance referring to people of Jewish descent. Often in threads that can go on quite extensively. The images typically try to obscure the profile of a large nose characteristic of the exaggerated caricature of a typical Jewish stereotype.
Oh man did you see that new post?
I did! Man these jokers just can't stop merchant-posting to save their lives!
A Gnome is a short, hairy nerd that flakes on it's fellow fantasy creatures at the slightest provocation. Why it does this is anyone's guess but none care to ponder it so it always goes unquestioned and unresolved. They give gifts of greenery to all who have the pleasure of meeting them. But they will scorn you if you commit to any plans with them.
My friend was being a real Gnome the other day. Little Bastard wanted to flake on me so I trapped him in a ring of magic mushrooms!