cup caking means flirting with another person doing anything leading up to, and excluding sex.
hugging, kissing, feeing up on the other person, and could be servicing (however that depends on the other party's definitions and boundaries of what cup caking is)
adjective: a word used to describe the act of talking on the phone with a significant other with romantic or affectionate content, usually with funny cute nick names or words.
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.