Top definition
a jonnycock is very often associated with elderly men. It is a condition caused through old age. The penis will have shrunk, but the foreskin will have remained the same. It will often resemble a baggy used condom.
I feel sorry for my grandad. It seems like he has developed a jonnycock. It is so pronounced he could keep his loose change in there.
by pipesucker February 28, 2018
Happy St. Patties Day!