Mr. Meeseeks is a blue humanoid character from the show Rick & Morty that poofs into existence upon pressing the button on the Meeseeks Box. Meeseeks are not born fumbling for meaning. They are created to serve a singular purpose to which they will go to any lengths to fulfill. Existence is pain to a Meeseeks.
Mr. Meeseeks #1: I'm Mr. Meeseeks, look at me!
Mr. Meeseeks #2: Hi Mr. Meeseeks, I'm Mr. Meeseeks! Look at me!
Mr. Meeseeks #1: Hi!
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.