The absolute most annoying fucking place to be in the world. No one wants to hang out on the street yet for some reason you can't be on the street without having to put up with types who seem to have a good time being on it.
Example: These loudmouths on the sidewalk who fess up with an overeager, obnoxious attitude every single time someone walks down the street. Society is such a troll these days.
From MJDeMarco's book The Millionaire Fastlane, they are the average people who don't know a lot about money and regardless of how much they earn, they will spend it all. In the worst case, they spend even more than they have and build a massive debt. Sidewalkers are usually one pay check from being broke, even though they may have a high salary.
Example: He's making six figures, but if he lost his job he's one month from being broke. Stupid sidewalker.
(n)A term used for those who work to ban smoking from sidwalks outside, including residentialareas.
Example: In March 2006, Calabasas, CA (pop. 25,000) passed a law banning smoking fro ALL outdoor public places. The city of Belmont, CA (pop. 25,000) followed almost two years later, extending the ban to also multi-unit housing, where ventilation is shared. There are more and more sidewalkers around.
Example: When going out in L.A., you're lucky if you don't have to pay to pee. Therefore, it shouldn't come as a surprise when nature calls and a sidewalk shitter starts doing his business out in the open.