When one has had enough to drink and is a combination of being obliterated and belligerently drunk.
Tom: I can't have another shot because ill be obligerent!
Robert: Don't you mean belligerent and/or obliterated
Tom: No, obligerent
The art of being obliterated and belligerent at the same time. (usually after large amounts of alcohol).
If you weren't so obligerent last night, I wouldn't have had to bail your ass out of jail again.