Question

what happens when you bite off more than you can chew

Answer 1

If you say that someone has bitten off more than they can chew, you mean that they are trying to do something which is too difficult for them.

i hope i helped u

Answer 2

It's an idiom....
It means to try to do more than you are able to do or to try to do something that is difficult for you.

Origin - It started to being used in late America in 1800's.