Jimmy Smack Share definition Flag The act of backhanding a dude in the nuts with solid force Paul was kinda being a douche, so I gave him a Jimmy Smack in the hallway. He dropped like a sack of potatoes. Jimmy Smack by Mvpcm09 June 2, 2015 0 0 Get merch Get the Jimmy Smack mug. Buy Now — $32.95 See more merch