clamhand Share definition Flag The act of doing something poorly or ineffectively, especially in a tense or dangerous situation. After the wiper flew off of my car while I was driving in torrential rain, I couldn't see anything and had to clamhand it to the nearby carwash. clamhand by Kyune February 3, 2021 0 0 Get merch Get the clamhand mug. Buy Now — $32.95 See more merch