Middle-of-the-road and Stick-in-the-mud

Middle-of-the-road adjective - Avoiding major social change or extreme political ideas.

Stick-in-the-mud and middle-of-the-road are semantically related. In some cases you can use "Stick-in-the-mud" instead an adjective phrase "Middle-of-the-road".

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

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