1. A sac (bag) of any kind. Could be a backpack, a purse, a plastic bag, a bag for
testicles, or any kind of bag/device that holds
stuff. See example #1.
2. Loosely used to describe anything. Also used as a suffix for one's name by a small, cultish group of linguists residing in the nation's capital. See example #2.
3. Inserted innocuously into sentences as a substitute for
words rhyming with it. See example #3.