Any steering angle will do, large or small, for skidded turns (tails slip more than tips, but no requirement for how much more they slip).
How's this for an enlarging list...
--Oversteer #1: load the front of the skis while they are slightly edged (skidded turns) and allow the tails to slip farther than the shovels (no muscular rotation) (LeMaster's first type of oversteering)
--Oversteer #2: load the tails of the skis while they are pretty flat and allow those weighted tails to slip farther than the shovels (no muscular rotation) (LeMaster's second type of oversteering)
--Muscularly rotate the skis throughout the turn with the foot as the pivot point, aka femur rotation, independent leg steering, thigh steering, leg rotation, point the knees to the trees, etc.
--Flatten/unweight the skis and dramatically pivot the tails outward at turn entry, before engaging the skis for the rest of the turn
--Upper body twisting (upper body rotation - turn shoulders first in direction of the turn, follow with legs/feet/skis)
--Waist steering done prior to full engagement
--Pivot around a blocking pole plant (with prior edge set)
--Anticipation (wind-up, release while skis are light and flat)
--Counterrotation (while skis are light and flat, or when skier is airborne)