Expecgender

Expecgender, also known as pivotgender or swivelgender, is a mutogender where one's gender changes based on the individuals one is around. This could be around only specific individuals or around individuals in general.

History and Flag
This term was coined by Tumblr user jasperthyst before July 2015.

The expecgender pride flag was created by DeviantArt user Pride-Flags on July 4, 2015.