from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Designating a personality type characterised as intellectual, introverted, and emotionally restrained.
Coined by WH Sheldon, from cerebro- + tonic. (Wiktionary)
But his cerebrotonic workouts endow him with the ornamental, gym-cultivated biceps shown off by yuppie lawyers and gay hairstylists, whose occupations hardly require them to do heavy lifting.