jerry
n. countablen. a person who does something very silly or makes a foolish mistake. It is a casual way to call someone a bit of an idiot, often used in a lighthearted way.
n. a person who acts foolishly or makes a clumsy error. Informal in register and primarily used in British English as a mild pejorative.
He forgot his keys again, the absolute Jerry.
I felt like a total Jerry when I realized I had been wearing my shirt inside out all morning.
While the term is often used affectionately among friends to mock a minor lapse in judgment, calling a stranger a Jerry can carry a sharper edge of social dismissal.
Clipping + -y.
Clipping of German + -y. Popularized during World War I.
Commonly used with the intensifier 'absolute' or 'total' in British slang.