Miley Cyrus is subtle.

Igniting what one can only hope is a long, public feud that is eventually fought through social media and only settled by the victor giving birth to Justin Bieber's love child, Cyrus has apparently slammed Selena Gomez.

According to TMZ, Cyrus was performing in Milan, Italy, on Monday when she saw someone in the crowd holding up a huge cardboard cutout of Gomez's face. She happened to be singing her delicate and understated song "FU" when she grabbed the cutout and sang to it for a bit.

Maybe the song means "Fight Underwear."

Cyrus eventually tossed the cutout away.

It's unclear -- maybe FU stands for "Forever Unclear" -- whether Cyrus has a real beef with Gomez or was just having some fun at the singer's expense. Though TMZ pointed out that Cyrus hung out with Bieber for some time last summer.

Your move, Selena.

Tony Hicks provides celebrity commentary for the Bay Area News Group. Contact him at Facebook.com/BayAreaNewsGroup.TonyHicks or Twitter.com/insertfoot.