a millstone around/round somebody's neck

a millstone around (one's) neck

An extremely difficult or disadvantageous burden or hindrance. I wish I hadn't bought that house—the mortgage is a millstone around my neck. Given the advisor's laundry list of scandals, he's proving to be quite a millstone around the candidate's neck.
See also: around, millstone, neck
Farlex Dictionary of Idioms.

a millstone around/round somebody’s ˈneck

something which limits your freedom or makes you worry: My debts are a millstone round my neck.A millstone is a very large heavy flat stone used to crush grain to make flour. This phrase refers to an old form of punishing people by tying a heavy stone around their necks and dropping them into deep water to drown.
See also: around, millstone, neck, round
Farlex Partner Idioms Dictionary
See also:
  • a millstone around (one's) neck
  • a millstone around your neck
  • a millstone round your neck
  • millstone around one's neck
  • a millstone about (one's) neck
  • millstone about neck
  • a millstone round (one's) neck
  • round
  • dig (oneself) in(to) a hole
  • dig yourself into a hole