The term "sissy-cum-swallow" refers to a specific type of porn video where the scene involves a man who is dressed or behaving in a feminine way, often referred to as a "sissy". In this scenario, the sissy character performs oral sex on another individual, typically a male partner, and they reach orgasm (cum). The act of swallowing refers to the sissy then consummating their partner's semen. This tag is used by viewers who are specifically interested in scenes that involve this combination of elements: feminine-presenting men and oral sex leading to the consumption of semen.