Abbreviation for "not bad"

Often used in online chat

N.B. is an abbreviation for non-binary, meaning not male or female.

Nb is short for no body

Used in text or messaging among people from Northern Ireland, it stands for No Bother pronounced as "No Baw" it's used in similarly to how "no problem" or "no sweat" is used.

NB stands for Noodle Boy, usually a teen who eats an excessive amount of noodle. Can also relate to someone who boasts about going to the gym but makes little/no gains

nb is an abbreviation for "nose breathe".

Nose breathes commonly occur when you find something funny. Rather than laughing out loud, one exhales or breathe though your nose.

Shorthand way of writing noob in online games and sometimes used to bypass word filters which recognize "noob" as an insult.