pea-souper

[pee-soo-per] /ˈpiˈsu pər/
noun
1.
Chiefly British Informal. pea soup (def 2).
2.
Canadian Slang: Disparaging and Offensive. a contemptuous term used to refer to a French Canadian.
Origin
1885-90; pea soup + -er1
British Dictionary definitions for peasouper

peasouper

/ˌpiːˈsuːpə/
noun
1.
(informal, mainly Brit) dense dirty yellowish fog
2.
(Canadian) a disparaging name for a French Canadian