super duper


adjective Informal.
extremely good, powerful, large, etc.; very super; marvelous or colossal.

1935–40; rhyming compound with invented second element Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
super-duper (ˈsuːpəˈduːpə)
informal extremely pleasing, impressive, etc: often used as an exclamation

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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