a state of nervous excitement, haste, or anxiety; flutter: I was in such a swivet that I could hardly speak.
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British Dictionary definitions for swivet
US informal a state of anxiety, confusion, or excitement: don't get yourself in a swivet
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012