Non-confrontational, agreeable to everyone, if used as an adjective. By itself, it is an interjection that roughly means "hey, everybody be nice and get along!"
"Bill wanted chicken for dinner, but Martha only wanted salad. As a puppies and rainbows solution, they had a chicken caesar salad."

Adam: "Wake up, David! If we don't delay the launch of the product, it's going to be a complete disaster!"
Robert: "Whoa whoa, guys. Puppies and rainbows!"
by Mark Jaquith November 12, 2008
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Hehe im seventeen living at home with my parents and dont have to support myself in any way at all!!hehe the world must be all puppie dogs and rainbows!!!hehe
by Skitzo16 June 3, 2005
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