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  1. of, pertaining to, characteristic of, or resembling a rat.
  2. infested with rats.

Origin of rattish

First recorded in 1680–90; rat + -ish1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for rattish

Historical Examples

  • The wicked rodent growled out something in broken Rattish, and retired to his hole, out of which he shook his tail in defiance.

    Letters of Peregrine Pickle

    George P. Upton

  • Barry covertly watched Natalie while Leyden's rattish characteristics were under discussion.

    Gold Out of Celebes

    Aylward Edward Dingle

  • We know all his evil cunning, and most of us have seen the rattish, yellow streak that runs clear through him.

    Gold Out of Celebes

    Aylward Edward Dingle

  • I was not all surprised, well knowing his rattish dispositions.

British Dictionary definitions for rattish


  1. of, resembling, or infested with rats
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