jackleg Share definition Flag Adjective, noun: The polar opposite of offdahook. A person or thing of low quality. A very unprofessional individual. MojoMan, after sniffing some bunk weed: "Man, what the fuck is this jackleg shit?" jackleg by stashgordon May 11, 2003 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