we just call em benders
Back during the time I played, and yes, it's been almost an eternity, I referred to those with less skating skills as 'ankle benders' much to the delight of other guys around me where that term stuck and is still used today when and if I run into anyone I played with.
MY term was basically for those that were such weak skaters, their ankles were sort of concaved outwards. 'Benders' is a great morph! Another term a teammate used was 'tripods' if a weak skater seemed to rely on staying up with the help from their stick, never really fluid in skating motion and looking hunched over and stiff.