Ham Slap Share definition Flag Ham slap is another phrase for jerking off, especially someone who makes a lot of noise when they jerk off. I just had a great ham slap.My room mate had a ham slap that vibrated through the walls last night. Ham Slap by Learninator June 5, 2019 0 0 Get merch Get the Ham Slap mug. Buy Now — $32.95 See more merch