Usually when a male (but can be a female I guess)is wearing boxers on a hot day, and the sweat from his ass saturates the boxers to the point that it makes it extremely uncomfortable to walk normally. It causes the individual to engage in a form of hobbling, hence "hobbs" ass.

Marginalized Orientations, Gender identities, And Intersex. it’s meant to be an all inclusive umbrella term for asexuals, homosexuals, multisexuals, trans people, and intersex people. Alternative to LGBTQIAP+
Alternative to MOGII, easier to pronounce.