to consider something common knowledge; to be used in place of duh,"of course" or "obviously" but with the added attitude of a 15 year old valley girl.
"This word should have been posted on this crazy-rockin site already."
"Doyay!"
Usually followed by a hair flip and chewing of some watermelon bubble yum.
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Someone who spends a lot of time at the lake or on the river. This person enjoys water sports and activities that surround water.
Girl: "I went to the lake last weekend and I am headed on a float trip this weekend."
Boy: "Enjoy your trip, waterbird!"