A term used to generalize the concept of one persons aggravation towards another person. Similar to 'complaining', yet more enthusiastic. Can also be used as a noise to convey the first persons aggravation towards the second person, sort of used as an example to show just how angry the person was.
"Man I hate it when my mom keeps blargin' at me like that."
"BLARRGG, James! Stop being such a homo!"