OFFICIALLY COINED:

“Going Kramer” — named for the character Cosmo Kramer played on the TV sitcom Seinfeld by comedian Michael Richards. The term is commonly used to describe an incident of a white person verbally abusing a black person with racial epithets, suddenly and without provocation. For example: “I was about to go Kramer on those n*****s”, “Did you hear Mr. Hanley went Kramer at the Shop-n-Haul?” See also “Going postal“.