hand in glove

[hand in glove] or [hand and glove] {adj.} or {adv. phr.} Veryclose or friendly; working together; in very close agreement orcooperation, especially for bad purposes.

The Navy and the CoastGuard work hand and glove, especially in war time.

Judges andothers in high office sometimes are hand in glove with gangsters tocheat and steal.