«اِلظُّرَاطْ شَبَع»

On its face the saying treats a bodily noise as proof of a full stomach: someone who breaks wind must have eaten well. The physical sign is read as evidence of an inner condition the person has not announced.

More broadly, it applies to anyone whose words, habits or slips reveal something about their situation. What escapes from a person, intentionally or not, is taken as a telltale sign of how they are actually faring.

Applied to someone when something they do or let slip reveals part of their circumstances or condition. Because its key word bluntly names breaking wind, the saying is coarse and unsuitable for formal or polite settings.