noun
window-shopper; customer just looking
Refers to a person who enters a shop or looks at goods without intending to buy. Often used in retail contexts.
週末は冷やかし客で店が混雑する。
On weekends the shop gets crowded with window-shoppers.
彼は冷やかし客だから、声をかけても無駄だ。
He's just looking, so it's pointless to approach him.
The verb meaning 'to tease' or 'to window-shop'; 冷やかし客 is the noun form for a person who window-shops.
Compound of 冷やかし (from 冷やかす, 'to window-shop' or 'to tease') and 客 ('customer').