This is especially for the Americans, since it requires an American English word.

In informal American English, a _________ (9 letters) is someone who is not very intelligent or lucky and who makes a lot of mistakes.

On the other hand, I have a question about prepositions. Do you use "on" or "at" in this sentence :

"My uncle has a shop ____ Hawthorn Road"

I think it's "on", but my friend said "at"

Jess