maladictorian 

The pinnacle of evil and childish behavior, especially in adults who should have grown up. Spiteful petty and mean, or vulgar for no reason. generally unpleasant people.

she was maladictorian at her small town high-school and never grew out of it.

maladictorian by mr bleakarm December 4, 2023

Maledictorian 

The lowest class point average in a graduating class. The opposite of Valedictorian.

The Maledictorian of the class is lots of fun, but dumb as a stump.

Maledictorian by St Barts October 29, 2020