Topic: HAIR AND BEAUTY
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Sense: 1
| Date: | 1900-2000 |
| Origin: | bob 'bunch (of hair)' (14-20 centuries), perhaps from Scottish Gaelic baban |
| Date: | 1800-1900 |
| Origin: | BOB1 |
| Date: | 1700-1800 |
| Origin: | Perhaps from Bob, an informal name for someone called Robert |
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bob2 [countable]
1DCB a way of cutting hair so that it hangs to the level of your chin and is the same length all the way round your head
2 a quick up and down movement of your head or body, to show respect, agreement, greeting etc : 
The maid gave a little bob and left the room.
The maid gave a little bob and left the room.3 [plural] informalPEC a shilling (=coin used in the past in Britain) : At last I'm making a few bob (=a reasonable amount of money).
At last I'm making a few bob (=a reasonable amount of money).