A British slang term used, jokingly, to refer to someone who is a bit full of themself, snobbish, and/or aristocratic. Who, basically, has an over-large ego.
The origin of the term is unknown for certain.
A Black Sabbath song. Contrary to common belief, "N.I.B." doesn't stand for "Nativity In Black," in fact, it doesn't stand for anything. Drummer Bill Ward had a beard that singer Ozzy Osbourne said looked like a pen nib. The band named the song after the nib and added initials so the name would be more mysterious. There are two Black Sabbath tribute albums named Nativity in Black, based on the faux acronym.
Your love for me has just got to be real