What is Bukkake?
A bukkake is a sexual practice consisting of one individual (male or female) getting his/her body sprayed with cum from the ejaculation of two or more males.
In some cases, more than a 100 people participates in bukkake parties.
Is it different from a gangbang?
Actually, a bukkake should be considered a type of gangbang, since a gangbang implies that one person has sexual relations with 3 or more males.