lib-hart Share definition Flag to yell "lib-hart!" is to act as though you are on the home side of the stands at a game and you are cheering for the other team. go go go you frikkin team! lib-hart! go go go. YAY TOUCHDOWN! *fans telling him to 'go AWAY'* lib-hart by danab December 8, 2006 0 0 Get merch Get the lib-hart mug. Buy Now — $32.95 See more merch