Megan Eugenio -- AKA "Overtime Megan" -- announced her split from Kyle Forgeard of the Nelk Boys on Monday ... claiming he cheated on her while he was in Australia.
The TikTok star, who boasts 2.6 million followers on the platform, posted a video laying out the allegations ... saying, "Not me seeing a TikTok of my boyfriend (now ex) cheating on me on his trip to Australia."
A fan left a comment, saying, "See me personally I would never.