Open English Wordnet
Nouns
(n)swisha brushing or rustling sound Verbs
(v)lap, swish, swosh, swooshmove with or cause to move with a whistling or hissing sound“The bubbles swoshed around in the glass”,
“The curtain swooshed open” Adjectives
(s)classy, posh, swishelegant and fashionable“classy clothes”,
“a classy dame”,
“a posh restaurant”,
“a swish pastry shop on the Rue du Bac” (Julia Child)