noun
flyer for sex-related services
Refers to a leaflet or flyer advertising adult entertainment, escort services, or similar sex-industry businesses. Often distributed on streets or posted in public areas. The term is colloquial and may carry a slightly euphemistic tone.
See also: ピンク
駅前でピンクちらしを配っている人を見かけた。
I saw someone handing out pink flyers for adult services in front of the station.
ポストにピンクちらしが何枚も入っていた。
There were several pink flyers for sex-related businesses in my mailbox.
ピンク alone can refer to the color pink or, in slang, to sexual or erotic content. ピンクちらし specifically means a flyer advertising such services.
ちらし (散らし) is a general term for a leaflet or flyer. ピンクちらし narrows it to adult-oriented advertising.
Compound of ピンク (pink, here used in its slang sense of 'erotic' or 'sex-related') and ちらし (散らし, leaflet/flyer). The term likely emerged in the late 20th century with the proliferation of such advertising in urban Japan.