List as long as (one's) arm Proper Noun spoken language informal
To refer to a very long list.
Hurry up, boy. We have a list as long as your arm to do.
Until the weekend, I still have a list as long as your my arm to finish.
I have a list as long as my arm to buy.
I'm sorry mom. I can't help you clean the house today. I have a list as long as my arm to do.
If you fall for someone's trick the first time then they are at fault.
Are you going to mess with me again? Fool me once, shame on you; fool me twice, shame on me.