The spelling of the phrase "gotten up on" includes two irregularities in Standard American English. The first is the use of the British past participle "gotten" instead of the more common American "got." The second is the inclusion of the preposition "on" after the verb "up." IPA phonetic transcription would be /ˈɡɑtən ʌp ɑn/. While it may seem odd to some, "gotten up on" is a valid and widely accepted phrase in certain dialects of English.