Typically a very "trashy" teenager who partakes in consuming alcohol and drugs, most often in risky situations with a high probability of police interference. Shitty kids are going nowhere in life, and most often know it. Destined to become trailer trash, the typical shitty kid has already proven that they are too cool for school by, well, not going anymore. Having a job disqualifies you from shitty kid status. Being pregnant however, most definitely elevates you straight from typical-party-teenager to shitty kid.
That party is going to get busted, I heard it's put on by shitty kids.