Tapertantrum 

The irritability athletes experience when tapering their workouts down in order to be maximally rested for competition.

Brett: Katie bit my head off today.
Terry: Oh she's trying to PR again this weekend. It was just a tapertantrum.

Tapertantrum by KatieBQ May 28, 2011

Tempertantrumatic

A person who gets mad at everything, and can’t control their temper

Maddie was very tempertantrumatic when she struck out.

Tempertantrumatic by Butt faced bitch xoxo August 23, 2020