Formal:
* Beijos: This is the most common and neutral way to say "kisses."
Informal:
* Beijocas: This is a more affectionate and playful way to say "kisses."
* Beijinhos: This is a more intimate and loving way to say "kisses."
Other:
* Um beijo: This means "one kiss."
* Mil beijos: This means "a thousand kisses" and is a very affectionate way to say goodbye.
The best way to say "kisses" in Portuguese depends on the situation and your relationship with the person you're speaking to.