Refers to someone acting unusually or erratically, against social norms.

Unexpected Behavior

Often implies a person is dealing with emotional distress or issues.

Emotional Implication

Used to suggest that someone's behavior will lead to negative consequences.

Used when a system or process unexpectedly stops working correctly.

Indicates a major disruption that prevents plans from unfolding as expected.

Links specifically to plans or strategies, emphasizing a deviation from a set path.

Can suggest a gradual change of direction, not necessarily immediate or abrupt.

Understanding the previous course or context is crucial for the phrase's impact.