Nathan Fillion created the acronym DRATW and it means Double Rainbow All The Way. An alternate spelling created by Nathan Fillion is: Dubul Rynbo, All The Way.
It means that which is:
•totally ecstatically wondrous
•endlessly joyfully amazing
•full-on orgasmically blissful
Here are some paraphrased usage examples of DRATW, including some from NathanFillion on his Twitter page:
Nathan Fillion instructing his ComiCon audience on what he has decided their participation will be with him at his panels: "The panel participation plan! If I say: DR, respond: DRATW. If I say: Full on, respond: Full on, DR. Be quick, be alert. Be DRATW." (DR is short for Double Rainbow)
"Why is the iPad so Dubul Rynbo?" (All The Way) (Double Rainbow, All The Way) DRATW
Firefly is so DRATW! Double Rainbow, All The Way!