You can easily create the cutest tailgating dress from your old sports t-shirt. I love the idea of making typical sports wear more fashionable and unique.
1 Yard of fabric (for skirting)
Option A: Sewing Machine
Option B: Iron a Sem
Option C: Liquid Stitch
If you sew your dress it will be more durable. The next best option if you don't own a sewing machine is ironing your seam together. If you also don't own an iron (you should get one) then you can use liquid stitch.
Cut your t-shirt first by removing the sides and collar.
Cut your skirting by tracing a skirt or dress with a similar shape. This will help you achieve a fitting size. Allow 1/4 - 1/2 inch around your template for seams.
Make sure the top of your skirting is the same width as the bottom of your t-shirt.
Next, Sew (or iron, etc.) your top seams, skirt seams and then attach the shirt to each of the skirt pieces. Lastly, attach the front to back for your completed dress. I tied an orange ribbon for a more finished look.
Completion notes: I added orange to each side of the t-shirt to allow it to align with my skirting width; the photo doesn't clearly show this. I suggest (if your t-shirt is very worn) to iron on fusible interfacing to stiffen the t-shirt for easier sewing and durability. I also didn't need to add elastic to my dress but depending on your fit you may need to use some. I completed my dress in two hours.