"French-Tranny" is a porn video tag that has two main meanings:
1. French: This refers to the origin or setting of the porn content, implying that it may be filmed in France or feature French performers.
2. Tranny: This term is short for "transgender," referring to a person whose gender identity does not match their assigned sex at birth (typically abbreviated as "TS" for transsexual). In the context of porn, this tag would indicate that the video features a transgender performer or involves transgender-themed content.
So, in summary, this tag is used to describe porn content featuring French transgender performers or scenes involving such individuals.