It's a more Spanglish version of standard, although I think in some countries like Mexico it's pejorative. And it's closer to the original writing than pronunciation.
It is a word that is not of our language and we should not use . He refers to the type of comedian who humorously through personal performances and standing before an auditorium ( Stand up comedy in English). Comedian, comedian, accountant.
STANDUPERO comedian or other artist who performs a show standing and alone on stage. It's usually standup comedy or stand comedian.