Slim Chance Share definition Flag An optimistic way to say one has no chance at accomplishing what he/she intends to do. John: Do you think I will ever become an all-star MLB pitcher? Doug: Slim Chance. Slim Chance by slimchanceofthisgettingpublish August 3, 2012 0 0 Get merch Get the Slim Chance mug. Buy Now — $32.95 See more merch