A person who supports a concept or principle.
Professional.
A prostitute.
A professional sportsman.
A chemical prophylaxis taken after sex to avoid contracting venereal disease.
An advantage of something, especially when contrasted with its disadvantages (cons).
In favor of.
Professional.
One who supports a ship or shipping deemed problematic (e.g., due to incest, age differences, abusive dynamics, etc.), and/or believes in the freedom to create and consume fanworks with such elements.
One who supports a specific ship or shipping in general.