generous with his sausage, but stingy with his bacon

Sarcastic term used by a lady for a guy with a major case of "one-sided willingness" --- da dude is always ready and eager to "open his zipper" (i.e., whip out his "sausage") anytime, but never seems all that motivated to "open his WALLET" (i.e., "share his bacon") to help you out financially, even with just basic stuff like groceries of household/repair materials.

Cool chick: So what's your new boyfriend like?
Hip girl: Oh, just yer typical pig --- generous with his sausage, but stingy with his bacon!