Submissive
From BDSM Wiki
A submissive is a person that gives up some degree of authority and/or control to a dominant either all the time or for the duration of a BDSM scene, not to be confused with bottom or slave.
The term "sub" is synonymous with submissive and is a gender neutral identification.
Submissive may also refer to the personality traits of a particular individual.
See also S-types.