Examples:

• The manager gave the underperforming employee an ultimatum: shape up or ship out.
• The coach told the team they needed to shape up or ship out if they wanted to make it to the playoffs.
• After receiving several complaints about his behavior, the principal told the student to shape up or ship out.
• The drill sergeant warned the new recruits to shape up or ship out, as there was no room for slackers.
• Tired of his messy habits, she told her roommate to shape up or ship out.
• Fed up with her partner's lack of effort, she told him to shape up or ship out.
• The head of the charity reminded the volunteers that they needed to shape up or ship out if they wanted to stay on the team.
• The band leader told the guitarist to shape up or ship out after he missed several rehearsals.
• The CEO told the developers to shape up or ship out, as the company's future depended on meeting the next milestone.
• The fitness instructor told the participants to shape up or ship out if they weren't going to take the class seriously.