When 5 or more guys stand around a girl and fart in her face while she masturbates, or 5 girls queef while a man masturbates. This also applies to guy on guy and girl on girl action.
I was in the middle of a surround sound last night and when the last guy farted I came so hard.
1. A facetious term used in relation to a grand national knob jockey or more specifically a collection said jockeys.
2. When in the company of a grate bunch a lads one can say they are surrounded by soundness.
1. Hank: Your man is Rale Sound ha Harry?
Harry: Ah sthop he's Surround Sound.
2. Hank: There's a grate bunch a lads in here, eh?
Harry: Ara shtop would ya Hankeen, tis Surround Sound.