Top definition
1. Someone who ruins the good mood of the moment

2. If given something dangerous someone will leave hurt.

3. A dog who will roam and never find his way hom

4. Steve Marino
"That kid Steve Marino is such a Ruinator."

"Yo megan is so nasty, she farted and it smelled like burning flesh....what a ruinator"
by Johnny Jehova February 05, 2005
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