jester
/ˈdʒestə(r)/noun
1- historical a professional joker or 'fool' at a medieval court, typically wearing a cap with bells on it and carrying a mock sceptre〈史〉（中世纪宫廷）逗乐小丑。
1.1
- a person who habitually plays the fool爱装傻的人, 爱逗笑的人。