In my experience being humble, I most frequently get

“Whaaaaaaaaaat you never heard of that, its so popular, everyone’s into this”

I just wait patiently and stare, maybe an occasional “ah, mmm”

and then eventually say “so can you tell me about it”

and really the answer is no, most people can’t articulate themselves and provide filler instead

it’s usually in relation to anything someone is passionate about, or an assumption they have that supports their passion. such as a social norm or ideal, not just engineering