Behind the times and Stick-in-the-mud

Stick-in-the-mud and behind the times are semantically related. In some cases you can use "Stick-in-the-mud" instead an adjective phrase "Behind the times".

Stick-in-the-mud adjective - (used pejoratively) out of fashion; old fashioned.

Behind the times and stick-in-the-mud are semantically related. Sometimes you can use "Behind the times" instead an adjective phrase "Stick-in-the-mud".