Popular fraternity hazing ritual where seniors stand in a line and drop pants. The new guy is expected to blow them all. They pee in his mouth, hence the name "Polish Soda Fountain".
The new guy was excited to join Delta Tau Chi but didn't expect the Polish Soda Fountain to leave such a bad taste in his mouth.
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.