Dick-Lash Share definition Flag When a man takes a womans head and forces it so hard up and down during a blow job, that the girl has a mild case of whip-lash the next morning. "I can barely move my neck side-to-side because Seth gave me dick-lash last night." Dick-Lash by Thisones4jizzy July 25, 2009 Get the Dick-Lash mug.