I saw three kids exit the public library, two girls, maybe 10 or 11 years old, and a somewhat older boy. One girl went in the opposite direction of the girl and boy, and she called over her shoulder “bye, skibidi sigma, see you tomorrow! Bye skibidi sigma’s brother!”
I thought that this language was all an elaborate joke, and the kids were not actually saying these things except in jest, but apparently I was wrong.