Ninny (noun)

1. A person who is foolish or silly.
2. A person who is mentally or morally weak or inadequate.

Origin:

The word ninny comes from the middle english word "nony" meaning a simpleton or a fool. it is a derogatory term used to describe a person who is foolish or silly.

Examples:

1. He was called a ninny for his foolish decision.
2. She was considered a ninny for her inability to understand the situation.
3. The ninny's behavior was causing a scene in public.
4. The ninny's lack of intelligence was evident in their poor decision making.
5. The ninny's foolishness was causing a problem for the group.