I think it is an inside joke about Nayeon's boyfriend. There are various theories by the fans about who that might be, but no one knows. Some fans think she is dating Seventeen Mingyu who is 2 years younger than her. Or she could actually be dating an older guy and Jeongyeon is teasing her about that by guessing the opposite. We just don't know.
@@Fergus316 Nayeon's boyfriend? Nayeon doesn't even date in 2yeon's videos!... 2yeon is more real than this story of Nayeon being her boyfriend..aff that still exists?!
It’s a jab at Nayeon being the madnae (opposite of maknae) while being a cougar at the same time. Basically saying that she’s so old that all the guys are younger than her 😂😂