Pupgender
Pupgender is defined as "a gender that is small, lively, cute and any other quality associated with puppies, that is puppy-like and/or connected to puppies." The term was made with system littles and non-kink age-regressors in mind, but can be used by anyone.[1] It may or may not be a kingender.
Pupgender falls under the xenogender umbrella.
History
Pupgender was coined and defined in April of 2019 by tumblr user xeno-aligned.[1]