Pypsack (m)
(with) definite article: deSpelling in Boone, who oddly refers to Spruit, in which it is spelt Pijpsack, instead; NB¹: ➺ homonym (Germany, Lusatia); NB²: ➺ Piepzak.
Boone, Hubert: De doedelzak. Woord vooraf door J. Van Haver en A. Doppagne… Inleiding door R. De Maeyer… Brussel, 1983, p.20, 93 (note 52: »Spruit [?]).