Parade-Rainer 

The person who puts a damper on your day; A person who rains on parades or celebratory events; a party pooper

"we went to the bridal party and all she did was bitch about her divorce. What a parade-rainer..."

Parade-Rainer by ailuig March 5, 2009

Parade Ruiner 

A fat or ugly cheerleader or baton/ flag twirler wearing a short skirt, tight pants, or a leotard, Usually marching in a parade.

"This marching band is pretty good."

"Nevermind, all the baton twirlers are parade ruiners."

-or-

"This parade is full of parade ruiners."

Parade Ruiner by Doublewolf October 23, 2009