SHDN = Shaved Head Douche Nozzle....a man who doesn't work, needs bailing out, a motorcycle, rims, a cell phone, bail and/or needs to pay back child support, gets all the funds from a desperate, dumb woman with exceedingly bad taste and then claims it was a gift.
The SHDN told Judge Judy that his gf bought him the truck and he didn't ask for it and he didn't need to pay her back.
This is an acronym for Sober Healthy Dinner Night. When two or more people go out together to enjoy a healthy dinner and each other's company, without drinking.
"I'm gonna have to bail tonight--I really need to detox"
"No sweat, let's just have SHDN"