DYK: He was shriveled up and long in the tooth.

Long in the Tooth – means old, especially of horses – Horses’s teeth, unlike humans’, continue to grow with age.long in the tooth

They also wear down with use, but the changes in the characteristics of the teeth over time make it possible to make a rough estimate of a horse’s age by examining them.The term was later coined in literature in connection with people.

Read – Historical Fiction Novels by Donna R Causey