Happy drink is a fun, strong, alcoholic drink to put you in a happy mood, such as margeritas and mojitos.

“快乐饮料”是一种让人心情变好的有趣的烈性酒精饮料，比如玛格丽特鸡尾酒和莫吉托鸡尾酒。

Example:

Hey I'm going to jump in the shower, why don't you whip up some happy drinks before we head out?

嘿，我打算去洗个澡，你何不在咱们出去之前喝点“快乐饮料”呢？