A portmanteu of the words 'shitty' and 'attitude'. It can be summarized as an individual who is overly cynical, uncouth, irritable and flat out rude. Usually people with shattitudes are extremely unhappy and wretched and seek to bring others down into their endless abyss of misery and self-loathing with them.
Jessica is hopelessly insecure and makes up for this by berating others as much as possible. She has a terrible shattitude.
When someone you know has a shitty attitude. They may be normal people until the smallest thing sets them off. Then they get a shitty attitude, or a shattitude.
Shattiqs are rage quitters in video games. Every time you are ahead of they'll just give up and rage quit. Shattiqs are known to get cheated on by people like Alex and luisa.