2

Ultimate fist pumping workout.

My friend threw out her shoulder by fist pumping at a club once.

The comment was made from a gif. In this gif, it shows a man doing a workout holding a barbell without the plates while pumping his fists.

3

It means they dislocated their shoulder joint.

  • I've no doubt that's what's meant, but my preferred (British English) version would be "My friend put her shoulder out by..." – FumbleFingers Sep 5 '12 at 2:01

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