A few days ago, I heard the Rolling Stones song "Jumping Jack Flash" on the radio, and the lyrics sounded a little odd to me:
I was born in a cross-fire hurricane
And I howled at my ma in the driving rain,
But its all right now, in fact, its a gas!
But its all right. Im jumpin jack flash,
Its a gas! gas! gas!
I thought that the lyrics were a little odd since I can't remember the last time I heard anyone describe anything as a "gas." (I was thinking "How on Earth would I describe this expression to a non-native English speaker?") When did this expression fall out of general use? Does it have any connection to nitrous oxide or anything like that? I know that it probably doesn't have anything to do with flatulence or gastrointestinal distress, but to me, it almost sounds like it does. Anyone know anything about the origins and/or usage history of this expression?