What does "x Big Body Bes" mean?

"Action Bronson" and "Big Body Bes" are the stage names of two rap musicians. The 'x' inserted between their names seems to be a rap substitute for "and" or "with". They have collaborated to make a "song" (if you can call it that) called "Water Sports".

The capital A and B in "Action Bronson" and the three capital Bs in "Big Body Bes" are clues that they are proper names (of people).