informal

a situation which causes a lot of trouble for you when you start to deal with it.

Quite what we do with all the waste generated by this industry is another can of worms.

Once you start making concessions to individual members of staff, you really open up a can of worms. (= cause a lot of trouble for yourself)

• have seen more than someone has had hot dinners
• have seen the last of
• have seen the last of someone
• have seen the last of something
• have several strings to bow
• have several strings to your bow
• have share of
• have share of something
• have shit for brains
• have sights set on
• have sights set on doing something
• have sights set on something
• have someone by the balls
• have someone by the short and curlies
• have someone dead to rights
• have someone down on like a ton of bricks
• have someone down on you like a ton of bricks
• have someone in corner
• have someone in sights
• have someone in stitches
• have someone in the palm of hand
• have someone in the palm of your hand
• have someone in your corner
• have someone in your sights
• have someone on a short leash