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One who repeatedly takes advantage of those people and situations around them, rarely doing anythign for themselves.

Oppurtunivores may use this skill to hitch rides from unwilling 'friends' or incessantly mooch off supermarket sample stands.

See Sample Slut.

Whenever she is in the grocery store, Susan turns into an oppurtunivore, hitting up free samples whenever she can.

by ///Motorsport October 14, 2006
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