To gain a better understanding of the phrase's significance, I started searching for instances where "Gomu o tsukete" was used in popular culture. I found that it has been referenced in various Japanese media, including TV shows, movies, and manga. This widespread usage suggests that the phrase has become an integral part of Japan's cultural lexicon.
Turns out, they were talking about something else entirely. (Not going into it here. Some things stay in the group chat.) gomu o tsukete to iimashita yo ne upd