Formal:
* مع السلامة (Ma'a al-salama): This is the most common and polite way to say goodbye. It literally means "with peace."
Informal:
* سلام (Salam): This is a more casual way to say goodbye, similar to "peace" in English.
* ماشى (Maashi): This literally means "going" and is used as a quick goodbye.
* باى باى (Bay bay): This is a borrowed expression from English and is commonly used among young people.
Other variations:
* شوفك (Shufak): This means "I'll see you" and is used when you expect to see the person again soon.
* خير (Khair): This literally means "good" and is used as a way to say goodbye with good wishes.
The best way to say goodbye in Egyptian Arabic depends on the situation and your relationship with the person.