Chiefly British Informal. pea soup(def 2).
Canadian Slang: Disparaging and Offensive. a contemptuous term used to refer to a French Canadian.

Origin of pea-souper

First recorded in 1885–90; pea soup + -er1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pea-souper

Historical Examples of pea-souper

  • On March 13 there was a tremendous fall of snow, and worst "pea-souper" we had had during the previous year.