UPA

UPA may refer to any of the following:Ultimate Players Association, the governing body of the sport of Ultimate in the United States.United Progressive Alliance, a coalition of political parties in  India.Universal Parliamentary Assembly, an alternative name for the United Nations Parliamentary Assembly;University Press of America, a publisher of academic books;Ulster Protestant Action, a now defunct Northern Ireland politico-religious grouping.
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You could be looking for UPA (initials or acronym) Upa may refer to:Upa (video game character), a fictional baby character created by Konami for Bio Miracle Bokutte UpaBridging in Brazilian jiu jitsu, a move designed to dislodge a mounted opponentUpa River, a river in RussiaUpa (Dragon Ball), a fictional character from Dragon Ball'upa'upa, a Tahitian dance, a Greek interjectory term of approval as in olé; also spelled Opa in EnglishuPA urokinase-type Plasminogen Activator, a serine protease enzyme
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Pan-American Union

v. ride a horse, ride horseback (Brazilian usage)