Language constantly evolves, everywhere, sorry it offends you. It's not a conspiracy.
Very few of the comments here are discussing the posted article, and it's downright shameful. Creating a reproducible substantive shelter on permanent wheels that can be moved by its resident themselves is novel, at least to me. Underhousedness (/whatever you want to call it) is not even a pet issue of mine. But I respect a good hack, and this is a great hack.