Top Definition
Fanktank is a combination of two popular complimentary words, fantastic and thank you. It originates from a conversation in a Pizza Hut wherein a patron, upon wanting to thank the waitress, accidentally said "Fanktank" instead of "Fantastic, Thank you!" It has become a local phenomenon with the help of Facebook.
"Fantank, America! Fanktank!"
by Salience May 28, 2009
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