An offshoot of the classic nursery rhyme "Hickory Dickory Dock". Normally used in frustration/anger/disappointment to express one's strong disapproval for the actions and/or nature of a jackass/nigger/over-all douche.
Guy1: Oh great, this jackass over here is fucking up our friendly round of Croquet.
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.