Cfyn Share definition Flag Cfyn is a boy named Cfyn, pronounced "Keffin". He can be heard mewing, and snorting. Has much comical value. "Dude, did you just hear that Cfyn 'mew'?" Cfyn by Chloe the bootylicious convent girl November 3, 2004 0 0 Get merch Get the Cfyn mug. Buy Now — $32.95 See more merch