Tardisac

 is a gender that relates to the tardis in one way or another.

Etymology
The word Tardis with the "-ac" suffix.

Definitions

 * a gender that relates to the tardis in one way or another. - fandom user cricket.teeth Dec 31st 2021

One specific definition: a gender that feels bigger on the inside.

Coining
Coined by fandom user cricket.teeth on Dec 31st 2021