Meaning Please note
Type Acronym
Rank ★ ★ ★  Common
Usage General (not just online)
Comments NB is short for "Nota Bene," which means "Please note" in Latin (similar to the ie and eg abbreviations. It is often used at the end of e-mail messages.
Example "NB: Your response is requested by the end of the week."
Updated May 21, 2010
Meaning Not bad
Type Acronym
Rank ★ ★ ☆  Average
Usage Online Only (chat, messaging, e-mail)
Comments NB can also mean "not bad," which is another way of saying something is fine.
Example "I test drove the new model and it was NB."
Updated May 21, 2010