Lash Share definition Flag Insult to describe a coward or fearful individual in french or just plain twat. Dan (paranoid dude): 'methinks i need to run!' Max (chilled dude): 'stop being paranoid you lash' Lash by Daniel a.k.a Benjamin January 10, 2006 0 0 Get merch Get the Lash mug. Buy Now — $32.95 See more merch