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to find something fantastic or is totally you (William), but only a Will or William can say this to himself. otherwise someone not with the first name William can say as a compliment to the William. Not usually used in sarcasm.
"OMG this is so willtastic!"
"This shirt is totally willtastic."
"That date was so willtastic last night!"
by Will Petersen July 27, 2007
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