What does OAR stand for

Hi there can someone tell me what does OAR stand for
as for in Alien.vs.Predator.720p.OAR.HDTV.DTS.x264-ESiR

For you with a very large display hungry of HD movies

i assume it is a kind of way to rip the signal from HDTV but i would like to get a technical explanation
Thank you

OAR stands for Original Aspect Ratio. OAR it's not a way of ripping the signal from HDTV. In this case it means that after the encoding, the original, native aspect ratio is kept. That's done using high quality, very compressable codecs like x264. That are capable of very high quality even at low bitrates. You're seeing a movie how it was originally intended, without any croping.