Meaning extremely high, being baked or stoned. It refers to the leaked clip of Miley Cyrus laughing hysterically while on Salvia.
Eric: "Dude what's with Kyle? He's totally hysterical!"
Steve: "I know dude! He's Higher than Miley Cyrus!"
Steve: "I know dude! He's Higher than Miley Cyrus!"
by NikolaiC December 18, 2010
Get the Higher than Miley Cyrus mug.