A term that originated from 4chan's /lgbt/ board used to describe a trans woman who, while transitioning, continues to present herself as male in public. Frequently done to avoid scrutiny, harassment and for safety measures. It may also be done as a temporary measure until she's ready to come out to her family or coworkers.
Boymoder is commonly depicted with short dark brown or Black Hair, styled in a Bob Cut with Blunt Bangs and Blunt Ends. She wears a long-sleeved Black Hoodie with red text that says "BOY" with the O being a Mars Symbol. Interpretations of Boymoder may include Black Pants and Black Shoes or simply Black Thighhighs. She sometimes carries an Ikea Shark. She is partly based off Nanase Kurumi (Menhera-Chan).
The extreme version of boymoder is referred to as a "manmoder", whilst the trans man equivalent of boymoder is referred to as a "Girlmoder".