slowboy Share definition Flag the definition of a man who shags anything, from a bearded yak to the ripples of a morbidly obese pensioner. 'ow dude your such a slowboy, she had a face like a frying pan' slowboy by terry the tangereen 2 February 22, 2014 0 0 Get merch Get the slowboy mug. Buy Now — $32.95 See more merch