Well, if you use some online dictionaries than you will find this is the true last word of the dictionary. Multiple z's generally imply that someone is sleeping, the more z's the deeper or longer that someone has slept.
this word will most commonly not be used in general conversation.
Man, I wish I could zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz for a while.
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.