Much like Godwin's Corollary, but involving the phrase "slippery
slope". The person
stating in an argument that something is a "slippery
slope", the discussion is ended and the mentioner has lost the argument.
While on a forum discussing "mandated vaccinations", Jim said it was a slippery
slope to death panels.
Everyone else recognized this as a sign that no rational discussion was going to occur and the discussion was ended. Jim is an asshole.
Barbara hated it when a discussion was ended via the LDB Corollary.