A new sport in Romania and Russia involves female fitness enthusiasts slapping each other's butts in competitions known as the 'Russian Female Slap Contest' and 'RFX' in Romania, aiming to knock opponents off balance.

The claims about a new sport involving butt slapping in Romania and Russia lack strong evidence. The claim that there is an organized sport in these countries where female fitness enthusiasts slap each other’s butts does not hold. There are cultural references to playful butt slapping, but there is no verifiable information indicating that it is recognized as a sport. The 'Russian Female Slap Contest' claim is supported by information on slap fighting, which involves men in slap contests, but no connection to females or a specific 'booty' theme. The 'RFX' (Real Xtreme Fighting) is unrelated to this concept as it is an MMA promotion. There is minimal evidence to support the claims, leading to low fact scores and confidence scores.