stepped in it

refers to getting oneself into a predicament that isn't easily resolved, as if one stepped in cow dung.

"Man, I really stepped in it when I signed this contract!"

"You really stepped in it when you criticized your boss in that meeting today."

jeerleader

The word combines "jeer" and "cheerleader" to define a new type of entertainment found at roller derby games that encourage the crowd to cheer for action by using fun games, teasing chants, and general ruckus-making.

Example: The Gotham City Roller Girl Jeerleaders

The jeerleaders passed out signs to the crowd to cheer for their favorite roller derby team.

bangover

This is the sore and painful feeling you get the day after skating in a roller derby match. It is usually accompanied by stiff muscles and bruises.

I have one heck of a bangover after skating in our derby bout last night.