decrepid monkey fist Share definition Flag The act of fapping to often which ultimately leads your hand into a deformed monkey fist shape yo.. i was home alone all weekend... ANNNNND, now im left with this decrepid monkey fist decrepid monkey fist by intheface December 8, 2009 0 0 Get merch Get the decrepid monkey fist mug. Buy Now — $32.95 See more merch