G-Eazy appeared to boast about scoring with Megan after sharing video footage of the rappers cuddling on a sofa as he repeatedly planted kisses on her cheek.
The Instagram Story clip emerged hours after he had reposted a sexy shot of the "Hot Girl Summer" hitmaker showing off her curves in a colourful outfit while posing on a staircase, captioning the image with four blue heart emojis.
However, Megan has since taken to Twitter to clear up the romance speculation, brushing off social media quips about the unexpected pairing.
"Lol (laugh out loud) alright nowww y'all got all y'all jokes out but I am not f**king G Eazy (sic)," she tweeted.
A fan then asked why the "No Limit" star had been "sucking the makeup off" her face, to which she replied, "He like Fenty" - a nod to Rihanna's Fenty Beauty line.
G-Eazy has yet to offer up his own comment on the dating gossip, but prior to hanging out with Megan, he had been linked to model Yasmin Wijnaldum.