At my college's food court and union building, I ordered a burger and fries. I took it up to the register to pay, and my debit card was declined. I realized that I didn't have enough money in my account, so I left the food there. Can they still charge me for the food they made, even though I didn't eat it? I gave it back to them at the register.

How would they make it if they havent even given you a reciept? u said a fast food restaurant

You're kidding, right? Do you think they can sell that food to someone else?

Do you ever wonder why your parents' education funding taxes keep going up??

No, they cannot charge your for something that you didn't technically purchase. If they try to you can dispute the charge. You should be good.