The term "being fired" describes being dismissed, fired, or even expelled from work. To understand this meaning, we must start from the old society.
In that era, those who were dismissed had no place to appeal. Upon hearing the boss's notice, they would have no choice but to roll up their bedding and leave.
Therefore, those who were dismissed were very sensitive and even fearful of words like expulsion and dismissal, finding them too harsh. Thus, some people began using "roll up one's bedding" as a substitute. Back then, those who were employed brought their own bedding, which the boss did not provide, so of course, they would roll up their own bedding when leaving.
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