filthy stuff n. in baseball, good pitching. Editorial Note: Stuff as a term for a pitcher’s ball delivery has a long history in baseball, dating to at least as early as 1905. Filthy stuff is also a euphemism for money. (source: Double-Tongued...
Bugs Bunny changeup n. in baseball, a slow pitch disguised as a fast ball which seems to stop in front of the plate. (source: Double-Tongued Dictionary)