When you wear shorts and a t-shirt indoors (typically in a dorm) when it's really subzero outside during the winter. A concatenation of "stay inside"'s.
"Why are you wearing beach shorts when it's 8 degrees outside?"
"Too lazy to put on pants since I just going downstairs to pick up Chinese delivery, so I've got on my stinsides."
"Too lazy to put on pants since I just going downstairs to pick up Chinese delivery, so I've got on my stinsides."
by wxs December 21, 2009