Antonyms of adj classy

1 sense of classy

Sense 1
classy, posh, swish -- (elegant and fashionable; "classy clothes"; "a classy dame"; "a posh restaurant"; "a swish pastry shop on the Rue du Bac"- Julia Child)

INDIRECT (VIA stylish) -> styleless, unstylish -- (lacking in style or elegance; "a styleless way of dressing"; "expensive but styleless country tweeds"; "wearing unstylish clothes")

Similarity of adj classy

1 sense of classy

Sense 1
classy, posh, swish -- (elegant and fashionable; "classy clothes"; "a classy dame"; "a posh restaurant"; "a swish pastry shop on the Rue du Bac"- Julia Child)
       => stylish (vs. styleless), fashionable -- (having elegance or taste or refinement in manners or dress; "a little less posh but every bit as stylish as Lord Peter Wimsey"; "the stylish resort of Gstadd")