"Our country is full of S.A.C.'s... the world is going to end!!"
Fred: "That guy is a S.A.C?? I thought S.A.C. meant 'strategic air command' ?"
Henry: "Nope, that guy is totally a S.A.C.... he has completely gone green. And have you lost your marbles?? Do you get your definitions from urban?? S.A.C. totally means Socialist/Anarchist/Communist!! Hippie!!
Fred: I think you should lay off the bud. You're paranoid. Let's go get some beer and chillax XD!!
2. A persons private space, area, or way of life.
2. Dude why are you all over his sac, he told you the story already, get off his sac.