Several months ago I found, on the free or very cheap rack at a used book store, Webster's Seventh New Collegiate Dictionary, published bak in '67. Lots of great words you can't find elswhere. For instance:

Jack-a-Lent

1. a small stuffed puppet set up to be pelted as a sport in Lent

2. a simple or insignificant person

Or just weird definitions:

Jack(2)

To hunt or fish at night with a jacklight

Makes you think twice about saying you are "jacked".