Where the male partner, is dressed up as a Maid, and forced/commanded to perform duties that a maid would do, such as cleaning, washing, etc. Can include sexual humiliation acts as well.
Believed to be one of the more popular activities of those being 'sissified' is to have the male dress up in a typical maid's garb.
In addition to the dressing up, duties are performed, that one would consider menial, or those of an actual maid.
Sexual activity, is dependent on the Main being the submissive, performing in the woman's role.