Galoot is a noun that means a clumsy or foolish person.
It’s not clear which language galoot takes its origin from, but we know the word was first used to refer to inexperienced marines. It may be used playfully or abusively.
I probably looked like a galoot when I showed up for my first day for work in an ill-fitting shirt. I had to explain that my washing machine was broken and that I wasn’t an idiot.