When having sex from the rear, known as "doggy style", after climaxing, and your partner turns around and smiles at you, you grab a propane tank and smack her in the your partner in the head with it.
"My girlfriend is pissed at me... I cumed all over her ass last night and when she was getting up to go take a shower, she turned around and looked at me and i gave her the propane tank suprise."
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.