stick-in-the-mud

Noun	1.	stick-in-the-mud - someone who moves slowly; "in England they call a slowpoke a slowcoach" Synonyms: slowcoach, slowpoke, plodder
Adj.	1.	stick-in-the-mud - (used pejoratively) out of fashion; old fashioned; "moss-grown ideas about family life" Synonyms: fogyish, stodgy, moss-grown, mossy

fogyish, moss-grown, mossy, stodgy, unfashionable, unstylish