1.    愉快的事; 高兴的事.pleasure; delight
例: 退休的人通常利用学画、学书法或养鸟来找乐子.

Retired people usually find their pleasure in learning painting or calligraphy or bird raising.

2.    引人发笑的事(含有幸灾乐祸的意思).joke;
laughing stock; poke fun at

例: 这些坏家伙专门捉弄人来找乐子.

These bad chaps like to make jokes by playing tricks on others.