mad lad Share definition Flag An insane dude. Someone who is out of his god damn mind. A guy that did something that nobody would have ever even dared to think of doing. Wow Jacob just drank that entire glass of water, what a fucking mad lad. mad lad by eaozimso February 20, 2017 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