High-fives showed their joy.
Meaning: This means that they were so happy and excited that they couldn't help but show it.
Choice of Words: High-fives are a way of showing excitement or approval by raising one's hand and slapping the palm of another person's raised hand. Showed means to make something visible or known. Joy is a feeling of great happiness or delight. When you put them together, it means that the high-fives made their feeling of great happiness or delight visible or known.
Alternative Expressions
Related Expressions