Based on the word "shyster," meaning "an unethical, unscrupulous practitioner, especially of law." It comes from the German term "scheisser," which literally means "one who defecates."
John Ashcroft got real shiesty after eating at Taco Bell.
When you're out and you have to take a shit, so you go into a sit-down restaurant and tell them you're going to order but you need to use the bathroom first. Then you sneak out, tell them you're vegan if they press you.
"That chinese isn't sitting right with me... We're an hour away from my apartment and the only thing nearby is Ruths chris"
"You gotta take a pooh shiesty bro"
When something or someone is cringe. Based on the behaviour of Mr Schuester from the hit TV musical Glee to be Schuesty means to behave/look or own something that is so cringe it's uncomfortable.
Did you hear Mr Schuester rapping. I couldn't bear it. It was so Schuesty.
Omg. Did you see Emma and Callum kissing. Ew they are so Schuesty.