wood kill 

anything that can ruin a boner/hard on/erection

So, you're at this hot and sexy beach bikini contest... then a girl starts puking... total wood kill!

wood kill by Soulja Girl Tell 'Em March 5, 2009

Wood Killer 

When you are "sporting wood" at an inconvient or embarrassing time, you need to think of the ugliest woman you've ever seen. She shall be affectionatley known as "The Wood Killer."

As the gorgeous nurse asked me to remove my hospital provided gown, I realized I was sporting wood. In order to avoid embarrassment I closed my eyes and pictured a naked picture of the "wood killer."

Wood Killer by bomba007 July 9, 2010

Woodkiller 

A person or action that can turn any erect penis flaccid.

Guy one: Dude, did you see that fat chick?
guy two: Yeah, she's a Woodkiller.

Woodkiller by Assjuyo Patruyo March 2, 2008