Llanfyllin Share definition Flag A quaint drinking town situated in mid-wales with a slight farming problem. Dafydd: Hey, lets go Llanfyllin!Iwan: Sounds like a plan monner, I'm parched. Llanfyllin by Spammer555 May 4, 2011 0 0 Get merch Get the Llanfyllin mug. Buy Now — $32.95 See more merch