spud juice
n.— «All 31,000 inmates locked up in Michigan’s 32 prisons seek an outlet of some kind. For some, the outlet is drugs smuggled from the outside or alcohol—”spud juice”—ingeniously distilled from vegetable peelings and concealed in cells.» —“Sports in prison serves as a way to keep inmates under control” by Scott Walton Baltimore Sun (Md.) Aug. 11, 1991. (source: Double-Tongued Dictionary)