Long schlong telegong is a common phrase among german teachers when singing along loudly in the classroom. It can be written as Ľ0ňğ Șçhĺòńğ Țėľêğõňğ, too.
"Yeah Ľ0ňğ Șçhĺòńğ Țėľêğõňğ ❤️❤️❤️", sings my teacher. "Aiaiaiaiiai Long schlong telegong", answers my colleague.