The phrase can imply relaxed waiting without stress or urgency.

Not Always Negative

Mainly used in casual conversations, not in formal writing.

Informal Expression

People don't always literally twiddle their thumbs; it's often used metaphorically.

Often suggests time is being wasted unproductively.

Can indicate someone's annoyance at having nothing useful to do.

Highlights a lack of motivation or opportunity to be more productive.