shafty /ˈʃæf.ti/adjective 4noun 1forms 3 adjective4 •(vulgar) Well-endowed; having a large penis. •(US, old-fashioned) Powerful, coolA Cadillac convertible is real cool or even shafty, and its driver, particularly if he be cat, or well-dressed, is cool Jonah. — 1951 •(Australia) Having long and dense fibres.In several of the flocks there is a most perfect shafty wool, and, although strong, is full of quality. — 1900 •Having visible feather shafts.A common fault is irregularity of hackle striping, many exhibits having the black stripe very much broken, and others have what is termed a "shafty" hackle. — 1932 noun1 •(informal) A bicycle that uses a driveshaft instead of a chain to transmit power from the pedals to the wheel. formsshafties · shaftier · shaftiest