Verb
come out of the woodwork (third-person singular simple present comes out of the woodwork, present participle coming out of the woodwork, simple past came out of the woodwork, past participle come out of the woodwork)
(idiomatic, disapproving) to appear or emerge unexpectedly or inexplicably, frequently in large numbers or quantity.
He won the lottery last year and he has had old "friends" and distant relatives coming out of the woodwork ever since.
When you try to find funding for a VVA function, it doesn't seem like it's any trouble at all. People come out of the woodwork with their money to help out because we went over and fought a war. R. Lee Ermey