The term 'Like a Stick-in-the-Mud' is used to describe someone who is unadventurous, dull, and stuck in their ways. The crossword solutions for this term are FOGYISH (7 letters), NOFUN (5 letters), STODGY (6 letters), BEMIRED (7 letters), and OLDFOGYISH (10 letters). FOGYISH means having the characteristics of an old person, while nofun describes someone who is not fun or entertaining. STODGY means dull and unadventurous, while BEMIRED means stuck in a difficult situation. Oldfogyish is a combination of old and FOGYISH, and it means having the characteristics of an old person to an extreme degree.