0 a person who practises the sport of slacklining (= walking along a rope that is stretched above the ground between two points):
This class is more technique-based, and covers advanced moves for experienced slackliners.
She is a professional slackliner and pulls off the most incredible tricks on the line.
The slackliner walked between two peaks on Mont Blanc in France.
A professional slackliner performed an epic rescue at a Colorado ski resort.
