noun / adjective
sexagenarian
sek-suh-juh-NAIR-ee-un/ˌseksədʒəˈneriən/
Aged sixty to sixty-nine, or a person of that age.
The woman celebrating her sixty-fifth birthday is a sexagenarian.

Etymology
Latin sexagenarius meant “containing sixty.” Applied to age, that numerical description became a label for someone sixty years old or in the decade beginning at sixty.
In context
you are a sex sexagenarian that is what we are referred to sexogenerian
More examples
- The club welcomes sexagenarians as well as younger members.
- My sexagenarian neighbor celebrates her sixty-eighth birthday today.
- He becomes a sexagenarian when he turns sixty next week.
Forms
sexagenarian · sexagenarians
Similar words
- sixty-something
- An informal alternative for someone aged sixty to sixty-nine.