noun
a person who participates in or is skilled at equestrian sports involving jumping over obstacles
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The equestrian gracefully guided her horse over the oxer in the show jumping competition.
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I can't believe how high that oxer is, it's going to be a challenge for the riders.
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Dude, did you see that horse clear the oxer? It was epic!
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Jumping over that oxer symbolizes overcoming obstacles in life.