Helwetes-säck (-)
(with) definite article: Helwetes-säckenSobriquet (also Soubriquet): A “nickname” that can be used endearingly or otherwise. In references to bagpipes it is used disdainfully only, however.
From Swedish "helvete" [hell]; Spelling in Carl Russwurm, »Eibofolke, oder die Schweden an den Küsten Ehstlands und auf Runö«, vol. II (Reval [today’s Tallinn], 1855).
Allmo, Per-Ulf: Säckpipan i norden: från änglars musik till djävulens blåsbälg (Bagpipes in the nordic countries [From music of the angels to the devil’s bellows]). Stockholm, 1990, p.35, 258, 301, 530 (1855c: Eibovolke [!]).