Use 'inside out' when someone has dressed with their clothes reversed.

Mistaken Appearance

Sometimes 'inside out' refers to a fashion statement rather than an accident.

Deliberate Style

'Inside out' implies knowing every detail or aspect of something.

When learning, aim to know your subject 'inside out' for mastery.

Something 'inside out' shows features usually hidden inside.

Use 'inside out' when emotions are expressed very openly.

Sometimes 'inside out' is used to exaggerate how strongly someone feels.