in the dead of night/winter

in the middle of the night or in the middle of winter.

The fire broke out in the dead of night.

• space cadet
• spare blushes
• spare no effort to
• spare no effort to do something
• spare no expense
• spare someone's blushes
• spark plug
• sparks fly
• speak for
• speak for itself
• speak for someone
• speak for something
• speak for themselves
• speak for yourself
• speaking as
• speaking as someone
• speaking of
• speaking of something
• speak mind
• speak of
• speak of the devil
• speak out
• speak out of turn
• speaks for
• speaks for itself