One step below a "friend with benefits". Chew toys are not necessarily dating or even seeing each other outside of their activitys. Chew toys may be met a work, school, or in any other arena.
Sara's chewtoy is Jason...No word yet on whether or not they're dating, however...
1) Any concept or topic of discussion occurring primarily to satiate intellectual cravings.
2) Suggestive of any concept or topic of discussion that is excessively intellectual. Oftentimes not grounded in the practicalities of everyday life.
"Yea, I still remember some Immanuel Kant philosophy from school, but I don't such material useful. It's for professors, philosophers, and sophists. Kant's book is just one of many intellectual chew toys."
A person(friend, SO, etc.) you enjoy to bite or nibble on (especially people with biting fetishes or furries), or a friend you tease with biting because the squirm away from it.
"I'm seeing a lot of marks... Have you been playing with your chewtoy again?"