This porn video tag refers to a scene involving a shemale performer with a large penis. In this context, "big" emphasizes the size of the shemale's dick, and "shemale" refers to someone who identifies as a combination of male and female or has both male and female sexual characteristics. This tag is used by those interested in watching content featuring a larger-than-average penis in a shemale performer.
In more explicit terms, this tag implies that the porn video features a shemale with a big dick who engages in sexual activities with one or multiple partners. The focus of the scene is on the size and presence of the shemale's penis.
Note: This description contains information for adult audiences only and may not be suitable for all readers.