Can be a male, someone male presenting, or someone of male presentation, who takes up the role of "sub" or as the submissive in a BDSM relationship/sexual scenario.
(1: a male) Oh yeah, I let my girlfriend/boyfriend/partner top me/power bottom! I'm a submissive boy.
(2: a male presenting person) Yeah my pronouns are he/they/she. Yeah, and I really like to be topped. I also go by a submissive boy!
(3 someone of male presentation:) Yeah, My pronouns are she/her/they/them. But my girlfriend/boyfriend/partner still calls me a prince in the bedroom. He says it's because I represent a prince more than a princess. I guess I'm a submissive boy!