"Schooloomf" is another stupid and pointless word for "Classmate".
Schooloomf is a
combination of the words
School + "Oomf = Schooloomf.
The "oomf" in "Schooloomf" stands for "one of my friends".
You will never EVER see this message be said by a
normal person; this word is only said when someone that lacks
knowledge of common english words andor a cringe trendy girl that noone wants to be around with tries to define "My friends in school/class".