make a rod for (your) own back

British

to do something that is likely to cause problems for you in the future.

People say that if you let your baby sleep in your bed with you for the first few months, you're just making a rod for your own back.

• flog something to death
• flog to death
• floor it
• flotsam and jetsam
• flunk out
• flunk out of school
• flush out
• flush out someone
• flush out something
• fly blind
• fly-by-night
• fly by the seat of pants
• fly by the seat of your pants
• flying high
• fly in the face of
• fly in the face of something
• fly in the ointment
• fly into a rage
• fly off the handle
• fly-on-the-wall
• fly on the wall
• fly the coop
• fly the flag
• fly the nest
• foam at the mouth