An insult, meaning they don't want to hear what you have to say. Normally told at school in one of these two circumstances--1)They asked you the question and you answered it honestly 2)You give your opinion on the same topic when they were talking to you
This is normally a sign of bullying or harassment, but some people mistake it for "kids being kids". If the same person says "Nobody Asked" to you more than once, you should stop talking to them as they are trying to get under your skin.
Person 1: What's your favorite Star Wars movie or TV Show?
Person 2: I like The Mandalorian, it was a great Star Wars show!
Person 1: THE MANDALORIAN IS TRASH, NOBODY ASKED!
Person 2: But, you literally asked...
Person 1: DOES IT LOOK LIKE I CARE?!
what people who are a fucking low life loser say because they can't think of anything because their 2 braincells are trying to comprehend what the conversation topic is
person 1: hey i'm playing minecraft
bitch: nobody asked
person 1: i don't give a shit if nobody asked you fucking dumbass