stick-in-the-mud

Related to stick-in-the-mud: muddy up

stick in the mud

Someone who is considered boring, often due to unpopular or outdated beliefs. Sally was tired of being called a stick in the mud by her friends just because she refused to drink alcohol. Just because I don't like roller coasters doesn't mean I'm a stick in a mud—I like lots of other fun things!
See also: mud, stick
Farlex Dictionary of Idioms.

stick-in-the-mud

Fig. a dull and old-fashioned person. Don't be such an old stick-in-the-mud. some stick-in-the-mud objected to the kind of music we wanted to play in church.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • a stick-in-the-mud
  • stick in the mud
  • stick in the mud, old
  • an old stick in the mud
  • behind the times
  • detract
  • detract from
  • detract from (someone or something)
  • flat-earther
  • on the wrong side of history