It can be something like: - But what about husband? - Oh... husband-schmusband... It is a kind of rhymed saying and it is very difficult to translate it into english properly. Usually a woman say it about her husband if he left her or if he does not meet her expectations; or may be she does not even has a husband but someone keeps asking her about marriage))

It's just a rhyming nonsense (муж-груш) and doesn't have any figurative meaning

Объелся груш is a rythm to the word муж. This phrase expresses wife's acrimonious discontent of her husband's matrimonial duty.

Did you hear this dialogue in movie? It's just saying. A rhyme

The exact origin of the expression is not clear. It is possible that it was an accidental humorous rhymes. Another version indicates Chinese pear as the "culprit" of male infertility. Finally, third, eating pears in the morning on an empty stomach might couse an indigestion. It is Much better to pay more attention to his wife. In other words the expression means something like: the the wife has husband but but he is of little use!