Rosay - an urban spelling of the word Rose'. Usually used in reference to the wine Moet & Chandon Rose'. It seems to be a libation of preference among the "Classier" Hip-Hop artist and is commonly mentioned by artist such as Rick Ross, Wiz Khalifa etc... Also commonly referred to as Gleeko, meaning sweet, which is a perfect way to describe this wine.
"Ricky Rosay!" - Rick Ross
"You think you could buy me a bottle of Rosay?" - Nicki Minaj
"Empty bottles of Gleeko and ashes on the floor, towel under the door; we wasn't supposed to even smoke." - Wiz Khalifa