slow slump Share definition Flag something that someone gets into when they make up stupid definitions. 2. eighth grader who does not know what she is talking about. "who ever came up with the defintitions for aaron wendt and slow slup is a slow slump" slow slump by howler January 11, 2005 0 0 Get merch Get the slow slump mug. Buy Now — $32.95 See more merch