'stick-in-the-mud' definitions:

Definition of 'stick-in-the-mud'

From: WordNet
adjective
(used pejoratively) out of fashion; old fashioned; "moss- grown ideas about family life" [syn: fogyish, moss- grown, mossy, stick-in-the-mud(p), stodgy]
noun
Someone who moves slowly; "in England they call a slowpoke a slowcoach" [syn: plodder, slowpoke, stick-in-the- mud, slowcoach]