Someone who often 'likes' people's status on Facebook. True definition is when no photograph of the perpetrator is available. Often victims of Rosie Twigger do not know her and believe her as a myth.
Have you been Rosie Twiggered?
John Smith is having a good day :)
6 minutes ago · Comment · Like
# Rosie Twigger likes this
John's been Rosie Twiggered, Have you?