moby /moh'bee/ (From MIT, seems to have been in use among model railroad fans years ago. Derived from Melville's "Moby Dick", some say from "Moby Pickle")

1. Large, immense, complex, impressive. "A Saturn V rocket is a truly moby frob." "Some MIT undergrads pulled off a moby hack at the Harvard-Yale game."

2. (Obsolete) The maximum address space of a computer. For a 680[234]0 or VAX or most modern 32-bit architectures, it is 4,294,967,296 8-bit bytes (four gigabytes).

3. A title of address (never of third-person reference), usually used to show admiration, respect, and/or friendliness to a competent hacker. "Greetings, moby Dave. How's that address-book thing for the Mac going?"

4. In backgammon, doubles on the dice, as in "moby sixes", "moby ones", etc. Compare this with bignum: double sixes are both bignums and moby sixes, but moby ones are not bignums (the use of "moby" to describe double ones is sarcastic).

5. The largest available unit of something which is available in discrete increments. Thus a "moby Coke-break" is not just large, it's the largest size on sale.

-Yeah, sorry about the cutandpaste, but it was just so funny.