The show can be offensive to some people but I find it very funny. MarmiteButter is correct. Roger was trying to be a racist and start some new ethnic slur. One must see the whole context to understand the whole thing. May I add, it would be better if he had said, "Don't Polish out on me." Of course this is more a nerd joke for English majors. Get it? "Polish" vs "polish". The only word in the entire English language that changes pronunciation whether the letter "p" is capitalized or not.

Understood

Alexandra, I never heard this before either, so I "Googled" it. To my understanding of what I read, it's simply saying "don't run out on me". It doesn't seem to imply anything against the Portuguese. I "pasted" a couple things from Google that should help answer the question: "Anne Murray | Time Don't Run Out On Me lyrics - Portuguese version" ; "Tlc | Don't Pull Out On Me Yet lyrics - Portuguese version"

Why ? What´s problem ?

in Italy whoever steps on a public transport without paying the ticket is called a "Portuguese" ( it's not a slur, there's some historical episode behind). In this case, one of the 3 people has not paid, so it made sense to me I was curious to know if English had the same way of saying, but apparently not, probably just coincidence.