Durasexual is an identity under the grey-ace spectrum where one rarely experiences sexual attraction, but when one does it lasts for a long time (typically over a year). It can be used as an identity on its own or by combined with other orientations.
A similar term is demisexual.
History
The term was coined by an anomynous through pride-color-schemes tumblr account on July 1st, 2016.
Flag
The flag was coined by an anomynous through pride-color-schemes tumblr account on July 1st, 2016. It has no confirmed meaning.
An alternate flag was coined by GenderfluidBiGirl. The flag has purple to represent asexuality, grey to represent the change in sexuality, and pink/red to represent allosexuality.
Resources
https://web.archive.org/web/https://pride-color-schemes.tumblr.com/post/146777322756/dura