小费除了tip还可以叫gratuity 啊?

根据朗文词典的解释：
gratuity
1. a small gift of money given to someone for a service they provided

2. especially British English a large gift of money given to someone when they leave their job, especially in the army, navy etc
所以，根据这个解释，gratuity可以翻译成小费。