As happy as a sandboy is an expression which implies blissful contentment and comes from the days when Publicans in the 17th-19th Century used to spread sand on bar floors to catch slops, spills, spit and so on. They used little boys ie Sandboys, to spread sand on the floor & sweep up the soiled sand. They were 'paid' in ale, normally the slops, which made them drunk/merry/happy.
another term for a station wagon, mini-van, or any other kind of vehicle that is targeted at the "family" demographic(also M.A.V.)
"Tactical advantages aside, the M.A.V. is top of the line for the holy warrior troop transport manufactured by the Church of Latter Day Saints Military Industrial Complex. Also great for family trips...to heathen lands."
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.