From Longman Dictionary of Contemporary Englishsashaysa‧shay /sæˈʃeɪ/ verb [intransitive always + adverb/preposition] WALKto walk in a confident way, moving your body from side to side, especially so that people look at yousashay around/along/down etc Models sashayed down the aisle.→ See Verb table
Examples from the Corpus
sashay• As she sashayed down the catwalk she caught sight of Sally and Edward.• Swiftly the skaters circled and arced and sashayed, firing their sprays of lethal stars.• Maxwell nodded as they watched a little, hustling minx sashay her way across the floor.• She sashays just out of my reach.sashay around/along/down etc• As she sashayed down the catwalk she caught sight of Sally and Edward.Origin sashay (1800-1900) French chassé, from the past participle of chasser; → CHASE1 