Rusty Corncob Share definition Flag Referring to a herpes stricken ( or other similar STD) male penis that has not be used in awhile. Honey, why won't you let me use my rusty corncob? Rusty Corncob by Digital V August 20, 2008 0 0 Get merch Get the Rusty Corncob mug. Buy Now — $32.95 See more merch