Definition
A 'numskull' is a stupid or foolish person; it's a synonym for 'blockhead' or 'dunderhead.' It implies a lack of intelligence or common sense, but with a slightly gentler tone than 'idiot.' Think of it as a playful insult you might use with a friend. It suggests someone is a bit dense or slow on the uptake. Unlike 'dunce,' it doesn't carry a strong sense of anger or contempt.