bob
[verb]
Synonyms: duck, bounce, hop, nod, oscillate, waggle, wobble

[TahlilGaran] English Synonym Dictionary ▲

Bob /bɒb $ bɑːb/ noun
Bob’s your uncle! British English spoken used to say that something will be easy to do:
Just copy the disk, and Bob’s your uncle!

[TahlilGaran] Dictionary of Contemporary English ▲

I. bob¹ /bɒb $ bɑːb/ verb (past tense and past participle bobbed, present participle bobbing)
[Sense 1-3: Date: 1300-1400; Origin: Perhaps from bob 'to hit, punch' (13-19 centuries), from the sound. ]
[Sense 4: Date: 1900-2000; Origin: ⇒ bob²(1)]

1. MOVE ON WATER [intransitive] to move up and down when floating on the surface of water:
The boat bobbed gently up and down on the water.

2. MOVE SOMEWHERE [intransitive always + adverb/preposition] to move quickly in a particular direction:
Mrs Foster bobbed about, gathering up her things.

3. bob your head to move your head down quickly as a way of showing respect, greeting someone, or agreeing with them:
He spoke to the girl, who bobbed her head.

4. CUT HAIR [transitive] to cut someone’s, especially a woman’s, hair in a bob:
her neatly bobbed hair

[TahlilGaran] Dictionary of Contemporary English ▲

II. bob² noun [countable]
[Sense 1: Date: 1900-2000; Origin: bob 'bunch (of hair)' (14-20 centuries), perhaps from Scottish Gaelic baban]
[Sense 2: Date: 1800-1900; Origin: ⇒ bob¹]
[Sense 3: Date: 1700-1800; Origin: Perhaps from Bob, an informal name for someone called Robert]

1. 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.

3. (plural bob) informal a shilling (=coin used in the past in Britain):
At last I’m making a few bob (=a reasonable amount of money).
⇒ bits and bobs at bit²(7)

[TahlilGaran] Dictionary of Contemporary English ▲

bob
verb
ADV. gently | about, along an old cigarette packet bobbing along in the current
PHRASES bob up and down the small boats bobbing gently up and down in the harbour

[TahlilGaran] Collocations Dictionary ▲

BOB
Baby On Board 
Battery Operated Boyfriend 
Best Of Breed (computer industry, also dog & cat shows)

[TahlilGaran] Acronyms and Abbreviations Dictionary ▲