(1)袋鼠法庭
指私设的无视或滥用法律原则与公正进行审判的法庭，或模仿正规法庭审判的模拟法庭。有多种情形，如狱中犯人设立的用以解决囚犯之间的纠纷的法庭，棒球队员们设立的用以「惩罚」防守犯规队员的法庭等。

(2)(无合法或正规的司法程序的)非法法庭

(3)模拟法律程序

• UPA
• upkeep
• uplifted hand
• upon
• upon information and belief
• upon personal knowledge
• upon sight
• upon the failure of heirs
• upon the faith of a document
• up-or-out
• upper house
• upper owner
• upset bid
• upset insurance
• upset price
• upstreaming
• up to now
• U.R.
• urban
• urban development action grants
• urban easements
• urban redevelopment
• urban renewal
• urban servitude
• urbs