in a coon's age
In an exceptionally long period of time. Based on the folk belief that raccoons (shortened colloquially to "coons") have a longer-than-average lifespan. Primarily heard in US, South Africa. I haven't seen you in a coon's age! How have you been? I haven't been on a vacation in a coon's age.
in a coon's age
and in a month of SundaysRur. in a very long time. (The coon is a raccoon.) How are you? I haven't seen you in a coon's age. I haven't had a piece of apple pie this good in a coon's age.