/ ˈkɒdzwɒləp; NAmE ˈkɑːdzwɑːləp/ noun
[ U ] ( old-fashioned , BrE , informal ) nonsense :
I've never heard such a load of old codswallop in my life.
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WORD ORIGIN
1960s: perhaps named after Hiram Codd , who invented a bottle for fizzy drinks (1875); the derivation remains unconfirmed.