Other forms: bobs
A bob is a short haircut level around the head. Have it cut into a bob, a sharp bob, a blunt bob.
It was a genuine act of rebellion in the 1920s, when cutting long hair off was a public statement, and hairdressers refused to do it. As a verb, to bob is to move quickly up and down, which is a separate word.
1nounbobA short haircut level around the head.
“She had her long hair cut into a neat bob that stopped at her chin.”
bob is a haircut.
From Middle English bobben, to move up and down, of unknown origin.
Middle English
bobben — to move up and down or back and forth
English, today
bob
From Middle English bobben (“to move up and down or back and forth”), of unknown origin. Compare Scots bob (“to mark, dance with a bobbing motion”), Icelandic boppa (“to wave up and down”), Swedish bobba (“to bob”), Faroese bøbbur (“something that rises or stands up; top”), Dutch dobberen (“to float, bob”).
Etymology from Wiktionary, CC BY-SA