Anybody know what Umbigada means?

Question

I read it in a Book about samba and it says that umbigada is "invitation to the dance"

Answer 1

It is when a dancer bumps his or her belly against another dancer's belly in a dance typical of the city of Bahia in Brazil.  In this dance, a dancer only enters the dance circle when she has received an umbigada from the previous dancer.  Hence it is the invitaion to dance that you read about.