During the 1960s and 1970s there was a significant influx of Finnish economic migrants into Sweden. Between 1950 and 1980 the number of Finns in Sweden increased from 45,000 to over 300,000. Attitudes towards Finnish immigrants were quite negative in Sweden. Derogatory expressions "en finne igen" ("yet another Finn") and "finnjävel" (equivalent to "Finnish bastard" or "Finnish devil") were commonly used. An anthology Finnjävlar was published, in which 15 Sweden Finns describe their lives and lives of their parents in Sweden.
Finnjävel (singular) and Finnjävlar (plural) are derogatory terms used in Sweden for Finnish immigrants, mostly during the 1950s and 1960s. In this context, jävel or djävel, literally meaning "devil", is a generic strong insult.
There is a book called "Finnjävlar" that discusses Finnish minority identity in Sweden. There was also a restaurant in Helsinki with the name.