rule 63
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
The proposition that it is possible to find genderswapped versions of every fictional character, especially as fan art on the internet.
Nghĩa · Tiếng Việt
Đề xuất rằng mọi nhân vật hư cấu đều có phiên bản đổi giới
Machine-translated — suggest a fix
Register: Internet, informal, slang
Where it’s used:
Used
American English
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “rule 63” mean?
The proposition that it is possible to find genderswapped versions of every fictional character, especially as fan art on the internet.
Is “rule 63” formal or informal?
rule 63 is generally Internet, informal, slang.