wildcat - noun

an exploratory oil well drilled in land not known to be an oil field

a cruelly rapacious person

any small or medium-sized cat resembling the domestic cat and living in the wild

wildcat - adjective

• outside the bounds of legitimate or ethical business practices
• without official authorization
• (of a mine or oil well) drilled speculatively in an area not known to be productive

wildcat - thesaurus

beast   brute   savage   unauthorised   unauthorized   wolf