Wiktionary
a. 1 (context informal English) Approximately thirty 2 (context informal English) Of about thirty years of age.
Usage examples of "thirtyish".
T-shirts to find a tall, leggy, thirtyish saleslady, librarian glasses perched on her nose above a lushly pursed mouth, looking past her, eyeing the MacKeltar with fascination.
The agreeable one was a bleary-eyed thirtyish deputy named Jesse Corn.
A thirtyish man in shirtsleeves with sharp blue eyes ||aid a bumper crop of wavy black hair, Carmichael aked over his shoulder at Nimec.
The relationship between ciphers and mathematics is a logical one, and the most recent manifestation of this was the work of a bearded, thirtyish gnome of a man who was fascinated with the work of Benoit Mandelbrot at Harvard University, the man who had effectively invented fractal geometry.
They also engineered his phenomenally rapid maturation with human growth hormone and raised him from fetus to thirtyish adult with nonstop intravenous feeding and electrically stimulated muscle development over a period of less than two years.