- nonsense; rubbish.
Origin of codswallop
First recorded in 1960–65; origin obscure
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- British slang nonsense
C20: of unknown 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
Word Origin and History for codswallop
said to be from 19c. (but first attested 1963), perhaps from wallop, British slang for "beer," and cod in one of its various senses, perhaps "testicles."
Online Etymology Dictionary, © 2010 Douglas Harper