Getting rejected or denied access to a certain place, generally from a social event such as a party. Comes from the made up verb "neg"

In the vBulliten software, there's a reputation system that increments and decrements depending on the type of reputation received. Users will either give or take away points by approving or disapproving with a post's content. Green bars represent a positive reputation while Red represents a negative reputation.

negging or getting negged occurs when a user takes away reputation points from another user. Often happens when users shitpost/troll/etc.

When you get HIV/STD test results and they all came back neg.

In some multiplayer games everyone starts off with a negative bounty (the amount in points you are worth). By collecting power ups your bounty increases. The intention is to deter levelled up players from attacking very weak players as doing so will remove points from their score.

A way to say no or express your opposition to an idea or proposition

Low-grade insults meant to undermine the self-confidence of a woman so she might be more vulnerable to your advances. This is something no decent guy would do. They say that the assholes get the girls, but I can spot negging a mile away and I reject these fuckers straight off.

Negative.
•Used mainly on Twitter to tell people something is negative.