The bare legs tag has no wiki, and its usage seems to be a little scattershot right now. The most intuitive usage I see is similar to things like no glasses, where characters that have a base outfit where they always wear pantyhose or thighhighs (e.g. Akemi Homura, Hirasawa Yui, Toosaka Rin) are without their usual legwear. Examples: post #878623, post #690099, post #809665
I'm not sure if outfits like swimsuits or lingerie should be included in that definition, though. My first instinct is not to include them, though debate is welcome.
Updated by hungkok2007