become a thorn in (one's) side

become a thorn in (one's) side

To become a constant or persistent cause of annoyance, frustration, or trouble. My professor was always a passionate environmental activist. Apparently, he's become quite a thorn in the oil companies' sides lately. This lawsuit has really become a thorn in my side. Let's just settle out of court.
See also: become, side, thorn
Farlex Dictionary of Idioms.
See also:
  • become a thorn in (one's) flesh
  • a thorn in (one's) side
  • a thorn in someone's side
  • a thorn in your side
  • be a thorn in (one's) flesh
  • be a thorn in (one's) side
  • be a thorn in your flesh/side
  • a thorn in the flesh
  • It sucks
  • it/that sucks