Tired folks are quarrelsome.

Understand the thought

Meaning in plain English

Weariness can be part of the setting of a quarrel. Consider whether a pause would help people respond more patiently, while keeping fatigue separate from permission to mistreat others.

What the words are saying

The saying connects being tired with being ready to quarrel. As an everyday observation, it invites attention to the circumstances of a disagreement as well as its subject. A conversation near the end of a demanding day may go better after a mutually agreed pause. That possibility does not explain every conflict or establish a diagnosis about anyone. Tired people are not necessarily hostile, and a genuine concern should not be dismissed as mere weariness. The useful response combines consideration for limits with responsibility for words and actions.

Everyday example

Two volunteers agree to return to a scheduling disagreement after a break, while noting the points they still need to resolve.

When to use it

Use it to consider whether timing and weariness are making a disagreement harder to handle.

Agent-assisted editorial interpretation. This explains the words; it does not by itself verify their author or earliest origin.