A person or a situation that is lame. It is a person who will kill your buzz at a party, or annoy the shit out of you at any given moment. It can also just be a loser that you would not wanna hangout with ever! It can be used to describe a situation that you would rather do anything to get out of. Antignar=Lame!
No fuck (insert name here), lets not invite him to the party! He'll just end up being an antignar and killing everyone's buzz!