Describes the phenomenon that people encounter when one of their good friends starts dating a new person and immediately becomes a different person. Signs include: not answering phone calls, not calling back, loss of desire to have fun, and being all around shady.
"Ever since he started dating this new girl, he has been acting like a totally different person; it's like we're not even friends anymore."
"Yeah man, he's pulling the Shady 180."
"Yeah man, he's pulling the Shady 180."
by SComp April 13, 2006