British slang term for the penis. Typically used as an excellent cheap insult. Used in jest (above "moron", just below "twat", and well below "cunt"), or used to describe someone who is doing something you think is annoying or a bit crap.
Scenario 1: one of your friends walks into the room and throws an apple at you. You reply: "Don't be a nob."
Scenario 2: your aging boss thinks he has broken his laptop because the battery ran out. You say: "Hah. He's such a nob."
Scenario 3: you have gonorrhoea, and it's making your nob hurt.
It’s mainly used when someone does or says something completely and utterly idiotic, and you yell it at them in recoil of the stupidsituation that just occurred.
Person 1: *Drops glass of water*
Person 1: “Oh no! I dropped my glass of water! Now there’s glass and water everywhere...”
Person 2: “Oh my god, you NOB!”