Is it bad if my thighs rub together when I walk?

Well thats excess of fat... I weight lift and do squats and my thigh still touches each other but thats fine. if you want to reduce the fat on your thighs you could start by exercising... running? squats??

looser clothing
diet
exercise
start walking 30-60 minutes a day, 7 days a week. drink a lot of water.

Its not rocket science. It hurts a lot harder getting it off, then it does going on. You did it to yourself.

I agree with "Julie". It's not bad if you don't mind the chafing. Or, that people will think you have thunder thighs. You can alway put bacon grease on them to limit chafing, but not much you can do about how people will see you without lowering your body weight.

Maintaining a healthy body weight from a healthy diet and exercise will ensure that your thighs do not get so flabby and rub together while you are walking.

squats

It's not bad, but it can cause chafing. You can put lotion on them if it becomes bothersome with them rubbing together. Maintaining a healthy body weight will ensure that your thighs do not get flabby and rub together while you are walking.

walking and running

I don't see how it would be bad. My thighs always rub together when I walk. It's annoying if anything. You can do side lunges I guess.