This porn video tag refers to a scene or video featuring a 10-inch dildo. The term "dildo" generally indicates a sex toy designed for penetrative play, usually resembling a penis in shape and size. In this context, the number "10" denotes the length of the dildo in inches, meaning it is quite large in comparison to average sizes. Therefore, this tag suggests a scene involving the use of an oversized, 10-inch long dildo for penetrative play in a sexual context.