handmack Share definition Flag your hand gets lots of sex while your penis looks on in a dissappointed depression. 4th grader- "dude u are suck a handmack" college junior- "you aint shit but a handmack" handmack by Big Fat J January 31, 2003 0 0 Get merch Get the handmack mug. Buy Now — $32.95 See more merch