Hafflefinger - A guy who thinks he's a cowboy but can't even ride a horse a

A guy who thinks he's a cowboy but can't even ride a horse and wears a hat that looks like it was stolen from a donkey.

My brother is a hafflefinger. He tried to ride a horse and got stuck in a fence.

That hafflefinger wears a hat so big it blocked the moon.

My friend is a hafflefinger. He tried to lasso a cow and got tangled in a tree.