"You say, with those ridiculously big eyes, are they for real? For real?"
Namjoon pulled such a clever worldplay here. Big eyes - shocked eyes. Big eyes - round eyes of westerns, in opposition to the western stereotype about Asian almond shaped eyes being small
"Oh my god do I look too funny?"
"How are you so shameless
We care about manners, we aliens"
Throughout the whole song, BTS is subtly mocking racist westerns who act shocked that BTS had the AUDACITY to grow beyond Asia and show up in the western industry.
Time after time, it's proven reality.