Formal:
* Me dê um beijo. (This is the most literal and formal way to say it.)
Informal:
* Me dá um beijo. (This is a more casual and friendly way to say it.)
* Beija eu. (This is a more playful and intimate way to say it, but can also be considered flirty.)
* Me beija. (This is similar to "beija eu", but emphasizes the action of kissing.)
Other Options:
* Um beijinho. (This means "a little kiss" and is a very affectionate way to say it.)
* Um selinho. (This refers to a quick peck on the lips and is considered a more casual and friendly gesture.)
Important Note: The most appropriate way to say "give me a kiss" in Brazilian Portuguese will depend on your relationship with the person and the context of the situation.