One who handles something (especially manually) or someone.
An advisor or manager to a person occupying a position or office to which the speaker believes the holder does not possess the typical qualifications and/or experience.
A subroutine that handles a particular situation such as an event or exception.
A controller, trainer, someone who handles a specified thing, animal or person (especially a prizefighter).
One who supports a specific ship or shipping in general.
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.