n. 1 frolic, spree, escapade, caper, fling, romp, adventure, revel, jape, game, antic, horseplay, shenanigans, mischief, prank, practical joke The boys say they took the horse just as a lark
v. 2 Often, lark about. frolic, caper, romp, revel, play, sport, cavort, gambol, Colloq skylark We spent a lot of time larking about after our exams