“biting off a little more than you can chew" 意思?

问题描述:

“biting off a little more than you can chew" 意思?
造句

硬翻的话意思是
比你能咀嚼的在多咬掉一点.
实际的意思就是自不量力那种.
I wonder if he is bitng off a little more than he can chew for heading the first place.