LPT: Request, How should you use a job you were fired from on a resume

Should you include it at all? I'm wondering as I'm applying for jobs again, after a several month unemployment break. I was fired from my previous job (bus boy) after working for 5ish months. I was canned due to lack of urgency and working too slow. I'm 17 right now, so to all you long time employers, and employee's out there, any help will be greatly appreciated.