This tag for Arnold Schwarzenegger actually was coined by Steve Lopez, a writer for the Los Angeles Times, in a column the day after the recall election that installed Arnold as governor, in spite of his acknowledged history of breast and booty grabbing (or, as Arnold described it, "being playful"). Garry Trudeau made Lopez's term nationally famous in the "Doonesbury" cartoons. It's a pun on a German term for a group leader, "gruppenfuhrer."
A greasy, fat white male pervert that is constantly on the hunt for cheap feel and grope of a nonchalant nature. Gropeopotamus are fround at shopping malls, grocery stores, play grounds, parks, concerts and sporting events. They are recognizable by their outdated, stained clothing, barrel-shaped beer guts, salivating mouths, nearly hairless bodies and stubby runt-like legs. The Gropeopotamus is aggressive and unpredictable and will grope and fondle adults and children of any sex, age or race. Gropeopotamus also smell like a mixture of musky sweat and aged cheese.
Cindy was enjoyed a day of shopping at the local mall until she and her friend Carla encounted a Gropeopotamus in the food court.
Any Greek/Italian guy who cannot control his actions after consuming way too much alcohol and starts groping girls at parties, bars, or clubs and also gets as low as possible on the dance floor in the process. See also Depper.
The Gropenator pounded 12 beers and started grabbing as many randomgirls that he could find while getting low on the dance floor at the club.