Collstellargender is a subset of collapsargender. It is a gender that is related to a stellar black hole; the smallest type of black hole, which comes from a collapsed star. Collstellargender has a strong gravitational pull, like a black hole, and tends to pull other gender identities into it and compress them before spitting them out in a compressed form.
Collstellargender can also be used as a prefix for other genders, for example collstellarboy, collstellargirl, collstellaragender, etc...
Collstellargender was coined on April 22, 2019 by Tumblr user mogaiformycharacters. The flag was designed by FANDOM user Reign of the breadsticcs on April 4, 2021.