Refers to the skiing or snowboarding event, or more generally to a zigzag course or movement.
from Norwegian slalåm
He competed in the Olympics as a slalom skier.
The car weaved through the curves as if in a slalom.
The athletes did a slalom run on the steep slope.
This mountain has a slalom course set up on it.
He weaved down the snowy road in a slalom-like zigzag.