stick-in-the-mud

stick-in-the-mud  {n.},  {informal}
An overcareful person; someone who is old-fashioned and fights change.
Mabel said her mother was a real stick-in-the-mud to make a rule that she must be home by 10 o'clock on weeknights and 11:30 Saturdays.
Mr. Thomas is a stick-in-the-mud who plows with mules; he won't buy a tractor.
Categories: {informal} {n.}