Top Definition
To be that guy who shows up in the background of photos usually being an idiot. Also so known as The Onifer
1) The Ruiner showed up in a tree in the back of our wedding photo!
by Jeighsunne January 29, 2009
1 more definition
A very common superhero that ruins things.
" I am the ruiner, let me ruin you"
by Starwarss May 25, 2009

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