warchalk

English

Etymology

war +‎ chalk, modelled on war-dialing.

Verb

warchalk (third-person singular simple present warchalks, present participle warchalking, simple past and past participle warchalked)

1. To draw chalk symbols in public places (such as the side of a building or a sidewalk) to show users of computers with Wi-Fi capability where a wireless network may be accessed.