"adj" As to or referencing a case of the "shits" or runny bum syndrome. "noun" Or a term of endearment for a piece of shit car.
I ate 20 jalepenos and drank a fifth of tequila and boy oh boy do I feel shitsy!
Have you seen my new Subaru? She's my shitsy and I love her.
The perfect level of drunkness, falling between shitfaced and tipsy.
Would you Like another beer, sir?
No, I'm feeling pretty shitsy.