- a short sleep; nap
- to take a short sleep, snooze
C20: of imitative origin
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
Examples from the Web for zizz
Then the doors would be slammed shut, all the clerks flew to arms, up ran the consular flag, and zizz!