Vomiting With A Smile On Your Face.

A term usually meant to describe early users of heroin, they often "vomit with a smile on their face."

"Of course he was vomiting — that’s what people on heroin do, they vomit. It’s called ‘vomiting with a smile on your face’.”

"Oh, so he's a new junkie?"

"Yeah, vomiting with a smile on your face."