Region: General | Usage example: Now that the team is winning, supporters come out of the woodwork.

Come out of the woodwork

Meaning

Appear unexpectedly, usually in crowds.

Used when many previously quiet people show up.

Origin notes can vary by region and source; this page gives the commonly reported explanation and usage context.

Insects and animals emerge from woodwork after disturbance, mirroring people appearing suddenly.

Used in American newspapers in the 19th century.