no smoking
A phrase used in notices indicating that the smoking of cigarettes, etc., is not permitted in the surrounding area.
He was well known for his unique delivery and his signature announcements of "No smoking in the Metrodome, either go outside or quit!" Source: Internet
The units frequently have small "Fasten Seat Belt" and "No Smoking" illuminated signage and may also contain a speaker for the cabin public address system. Source: Internet