Celebrate a milestone with humor! This black t-shirt features a playful design perfect for a 13th birthday. The text displays the number of years, months, days, hours, minutes, and seconds, humorously concluding with "AND I HAVEN'T KILLED HIM YET!" in distressed lettering. Great for gifting to a parent, sibling, or anyone connected with the birthday celebrant who appreciates a good laugh. This comfortable tee makes a memorable and fun statement at any birthday gathering.