lights out Share definition Flag In sports, it means great performance. "Maddux was lights out on the road, winning 8 of his last 9 decisions." lights out by erotica69 September 18, 2005 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