This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. One who is engaged in speculative mining or well drilling in areas not known to be productive.

n. A promoter of speculative or fraudulent business enterprises.

n. A worker who participates in a wildcat strike.

n. Someone who drills for oil speculatively

n. A worker who participates in a wildcat strike

n. person who makes wildcat ammunition and the guns that use them.

n. One who prospects for oil or ores, or takes other ventures; one who opens new oil-wells, mines, or similar venturesome enterprises.

n. an oilman who drills exploratory wells in territory not known to be an oil field

"The term "wildcatter" generally refers to a person or company that drills oil wells in areas not known to be oil fields, indicating that many of the companies included in this fund maintain speculative, risky operations."

oilman