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1.
This is the term used to describe a Twitter account which looks like it's from a celebrity, but isn't, or the person operating same.
"Is that really Madonna's Twitter account? No, that's just some Rogen."
by LloydHenried March 29, 2009
 
2.
a beast thats retardlt hopping around
omg look at the fucking rogen
by lizzy November 15, 2003