kuzka's mother

"to show Kuzka's mother to someone"

"to teach someone a lesson, to punish someone in a brutal way".

The closest English equivalent is "to make it hot for someone" or "to make target's life hell."

Student 1: "man screw this class. i hate this professor"
Murbaticus: "I will show you Kuzka's mother!"
Student 2: "oh Scheiße! stoff is going down!"