Expression used all the time by Millenials
1) Expressing disbelief or excitement 2) An exaggerated response to something mundane/boring. Often used to validate whatever the other person is saying.
“I went back to my hometown for the holidays and ran into my high school crush. Can you believe he’s married now?” “Really? That’s wild”
Added August 2020 by lindsayc
5 out of 6 English speakers have heard this