Similar to a spotter in weight-lifting, a sputter is an individual whose job it is to monitor someone performing auto-erotic asphyxiation so that the act does not proceed to death.
If Michael Hutchens would've had a sputter, INXS could've been bigger than U2.
A fart with some anal contents (juicy, chunks...) that gets sprayed on your underware.
Dude 1: So there I was in line at the grocery store when I had to fart.
Dude 2: Ya?
Dude 1: Well, my fart was more than a fart...I got some sputter butter...my underware was so messed-up.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.