Is 132 pounds for a 5 foot 1 inch 14 year old girl over weight?

No. I weigh the same and I'm not overweight, though I have a very large stomach. Try to keep your stomach pulled in whilst in tight fitting clothes. Do not let anyone tell you that you are overweight, apart from yourself. There is an exercise I do every now and then to check this. Stand with no clothes on in front of your mirror. Stand sideways so you can see a profile of your body. Try and grab your belly. If you can grab a lot, cut back on the sweets and treats. If you can't grab a lot, try to see how many 'fat rolls' you have whilst sitting down and leaning slightly forwards. If you have more that 2, you need to stop eating that extra handful of crisps. Finally, lay flat on your back on a flat surface. If your belly sticks out a lot, well you know what to do.

Hope I helped