إِيشْ مَا طَبَخِت الرَّعْنَة بِيَاكْلُهْ جُوزْهَاالأَعْمَى

An Egyptian proverb from http://www.egyptianarabic.com:


إِيشْ مَا طَبَخِت الرَّعْنَة بِيَاكْلُهْ جُوزْهَاالأَعْمَى
(aish ma Tabakhat ir-ra'ana biyakul goozha il-'ama)
Literal meaning: Whatever the crazy wife cooks her blind husband will eat.
Meaning: To get away with bad behavior, as in the English saying "To get away with murder"

يا واخدة القرد على ماله، يروح المال ويبقَى القرد على حاله

An Egyptian proverb courtesy of Cherine of the wonderful Wordreference forums

يا واخدة القرد على ماله، يروح المال ويبقَى القرد على حاله
Literal Meaning: If you marry a monkey for his money, the money can be lost, but the monkey will still be a monkey.
Meaning: Think twice about marrying an ugly person for his money.

This is my new favorite.