Lebanese Slang, author:Massoud el-Khoury of Berkacha, Lebanon

The literal translation means "keep the potato cooking on its own". The expression is meant to advise patience to its recipient. In Lebanese rural customs, it is common to put potatoes in the stove and let them cook on wood fire during cold times, should the cooking be continuously interrupted, the potatoes would be ruined and in a similar comparison, matters of life should be kept at their own pace, thus, the use of this expression.

Khosh Bosh - خوش بوش: Lebanese Slang, of unknown origin.  The word "Khosh/خوش" in Farsi means "Good", and is used in some of the Gulf countries such as Kuwait in the local dialect.  The expression as a whole describes a relationship between two people, which in principle is not expected to be close but somehow is, i.e. a vendor and his new business client, a person with another of much higher social rank:

Person 1:  "I met the CEO of Nissan at an event a month ago"

Person 2: "wow, did you get to speak to him"

Person 1: "Man we became friends already, ana wiyyeh sorna Khosh Bosh [we became Khosh Bosh]"

خيرها بغيرها

It is said whenever you cannot do something now, and you wish to do it later.  Literally means "the good that was supposed to come out of it (the situation), will come from another one (situation)".