adj., a word used to describe anything bitchin'awesome or better than having a threesome with Amgelina Jolie and Lyndsay Lohan (MMMMMM MMMMMM Good).The precedent was set by Adam Sandler that blue ducks are Quacktastic.
Something that's not fantastic, but you feel as though you need to be a sarcastic asshole and, at the same time, avoid having to fake your enthusiasm.
YOUR FRIEND: "Hey! I just got a new Achievement on Xbox Live!"
YOU: "Oh...that's...quacktastic."
YOUR MOTHER: "Honey, I bought you a few new shirts from JC Penny's. I hope you like palm fronds and pineapples!"
YOU: "Thanks, mom...That's quacktastic."
A KID: "Hey mister! Guess what?? I can count to 50!"
YOU: "That's quacktastic."
An individual capable of spuoting off quippy quips at a moments notice, usually found being quippy at local hang-outs and "quipping down" on those not as quiptastically fortunate as themselves.
The combination of Captain Qwarks' superhero name from the Ratchet and Clankvideo game series with the word fantastic, which means the same thing as fantastic but in a prideful manner.