Dictionary.com
definitions

cabbage bug

noun
  1. harlequin bug.

Origin of cabbage bug

An Americanism dating back to 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for cabbage bug

cabbage bug

noun
  1. another name for the harlequin bug
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