Fun.
depression, trough, downhill, slide, recession
Skiing
Downhill skier.
Downhill Skiing
you slide downhill over the ice.
I think it would be downhill Mountain Biking
well there is the downhill luge...
Minerals
A steep slide is commonly referred to as a "chute" or a "slope." These terms describe a sharply inclined surface that allows objects or individuals to slide quickly downhill.
I think it would be ski cross or downhill
She is a downhill skier and her correct name is Chemmy Alcott