in cahoots (with (someone))

working secretly with someone.

She was in cahoots with this guy who was smuggling drugs across the border.

Usage notes: usually said about doing something dishonest

• a long shot
• along the line
• along the lines of
• along the lines of something
• along the same lines
• along the way
• along those lines
• along with
• along with something
• a loose cannon
• a lost cause
• a lounge lizard
• a love child
• a love-in
• a love nest
• a low ebb
• a lump in throat
• a lump in your throat
• a magic moment
• a magic touch
• a magic wand
• a man-about-town
• a man after own heart
• a man after your own heart
• a man-eater