Sub-Bluffing Share definition Flag When two classmates temporarily switch names to fool a substitute teacher. John: Why the hell did Nick just answer when the sub called on Matt? Bob: They're sub-bluffing. Sub-Bluffing by youjustlostthegame......bobby November 21, 2010 0 0 Get merch Get the Sub-Bluffing mug. Buy Now — $32.95 See more merch