You can't take a biscuit OFF a baby???

[IQué]

Hi there

I have a problem with this frase "You can't take a biscuit OFF a baby".
I do know the idiom "to take the biscuit" but what is meant by "OFF a baby" in this sentens
(sorry, can't find the right spelling of sentens/sentence )

Please help

IQué - Denmark....to be or not to be!

[Casiopea]

To take something off someone means to remove; disarm (e.g., take the gun off the criminal; take the cookie off the baby.

Spelling help: phrase, sentence

[IQué]

Well, it is the whole context that puzzels me. It is from a Scottish short story called "Sugar Baby". I have that idea that is when somebody can't take somthing away, that already is a part of somthing existing?

Btw. my dictonary says "sentence" = Verdict (n.) Pass judgment (v.)
...but it is only MS Word offcause.

IQué....to do or not to do.