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1.
Popular internet saying brought upon by one Barron Shiel and one James Duffy, inspired by the singer Miley Cyrus (or Hannah Montana) used in cases to describe someone that is getting overly excited, stressed, or simply silly; first used in the popular MMORPG World of Warcraft. See lyrics to "See you again" for reference.
IT'S A TRAP!
Dude he's just being miley!
 
2.
Popular internet saying brought on by one Barron and by one James. Inspired by the singer Miley Cyrus (or Hannah Montana) used in cases to describe someone that is getting overly excited, stressed, or simply silly; first used in the popular MMORPG World of Warcraft. See lyrics to "See you again" for reference.
IT'S A TRAP!!!
Dude, he is just being miley!

He is getting so angry!
He is just being miley!
 
3.
singer/actress Miley Ray Cyrus posed for photos that gave the appearance that she was bare breasted beneath a sheet. Also published from the shoot were pictures of a scantily clad Miley lounging in bed with her father, Billy Ray Cyrus. About the same time as this shoot Miley's most popular song contains a phrase "Felt like I couldn't breath. You asked what's wrong with me. My best friend Leslie said, 'She's just being Miley.'"

Definition: Leaning on, or posing with, your dad, or an older man, in an ambiguously inappropriate way.
Yo man, I saw this 13 year old girl, dressed like a raging slut, leaning on her dad's arm in the grocery store--"she's just being Miley."

Or...

I saw this slutty girl "just being Miley" with her dad in the grocery store!

or...

Hey supper market slut, stop "just being Miley" with your dad on isle 12. Take that shit to Vanity Fair.
by Davecandividebyzero May 04, 2008