throw shade v. phr. to take a superior attitude; to criticize, demean, or insult; to diss or derogate. Editorial Note: This term has is most often associated with Black English, but it is also said to be used among gay and cross-dressing performers and club-goers. Etymological Note: Probably related to shade, v., which means “to defeat, to outdo” and dates to at least as early as 1925 and also to the far more common put in/throw in the shade with the same meaning. A mild form of the term was popularized during the late 1980s and early 1990s when the much-hyped dance and peformance style of “voguing” came to widespread attention. (source: Double-Tongued Dictionary)
Further reading
Rosalind from Montgomery, Alabama, says her mother used to scold her for acting like a starnadle fool. The more common version of this term is starnated fool, a term that appears particular to Black English, and appears in the work of such writers...
Understanding the varieties of conversational styles can mean the difference between feeling you’re understood and being insulted. “High-involvement” speakers interrupt or talk along with someone else to signal their enthusiasm...
Example: “Historical moments in shade throwing, Inauguration Edition 2013. Keep your eyes on FLOTUS’ reaction to what Boehner said to her and POTUS.” Source: http://mattyrab.tumblr.com @mattyrab