Definition
A person who is foolish or acts in a silly manner, especially a child.
傻瓜（尤指孩子）
Stop being a silly billy and get your work done.
別再當個傻小孩了，快點完成你的工作。
He was running around like a silly billy, and everyone was watching him.
他像個傻小孩一樣跑來跑去，所有人都在看著他。
Don't be a silly billy, that's not a good idea.
別當個傻小孩，那樣做不是個好主意。