Walnut Share definition Flag A walnut is someone who hasn't been cracked open to reality. Someone really innocent or naive. "That bitch José is such a walnut! He doesn't even know what a lemon party is!" Walnut by Pseudonyms 6969 March 20, 2016 Words you can keep railfan mug chonk mug chud mug based mug 67 mug slime mug mogging mug chopped mug thot mug glazing mug huzz mug yams mug larp mug unc mug cracked mug simp mug baddie mug bop mug lolcow mug