Put apples in a kitchen sink, a bathtub or a large shallow bucket filled with water. Each player must grab an apple with his or her teeth, using no hands. The fun of bobbing is for the bobbers to get wet! So don't forget the towels.
Source: wiktionary
Not to be outdone, another group of students formed the Bobber's Union and wore a much different hairstyle.
Source: wiktionary
Newspaper articles from the time describe employers who refused to hire women with bobbed hair […] In Japan, a speaker at a national hairdressers' convention declared, “All bobbers are not dissolute women, but all dissolute women are bobbers.”
Source: wiktionary