你是問 Mother Hubbard?
這不是俚語,只是一個英美人用來取代某些字或不表達(dá)任何意義的諧音.
Mother Hubbard 出自兒童諧音歌謠“Old Mother Hubbard”：
Old Mother Hubbard
Went to the cupboard,
To give the poor dog a bone;
When she came there,
The cupboard was bare,
And so the poor dog had none.
.
聽上去你問的句子是用 Mother Hubbard 來取代一個不雅字眼 You mother f_ _ _ _ _.