Laibu
A little adult who yells 'I'll kill you' every time she's called that. She's got a nice voice, but she uses it to scream at people instead of learning stuff.
'I'll kill you!' she yelled at me when I called her Laibu in the hallway.
She screamed during the school play and got a standing ovation... and a C.
She DM'd me: 'You called me Laibu. I'll kill you. You're a loser.'