In the US this is known as a posterizing dunk, as there's a possibility that a dunk like this could end up as a poster on someone's wall. Though I think the only person that wants a Xavier Henry poster on their wall is Xavier Henry and maybe his mother.
Lakers players Henry threw down this dunk in the face of the Pelicans Jeff Withey as his side won 116-95.
Amusingly, a dunk like this is also known as a 'facial'. I'll just leave that one there for you to think about.
via Reddit