Höllensack (m)
(with) definite article: derSobriquet (also Soubriquet): A “nickname” that can be used endearingly or otherwise. In references to bagpipes it is used disdainfully only, however.
Tonurist [sic], Igor [Tõnurist]: The Estonian bagpipe. In: The bagpipes in Europe, 1 (1976), p.48.
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.530 (1855c).