/nɒb; nɑb/
n
1 (a) round handle (of a door, drawer, etc) （门、抽屉等的）圆形拉手.
(b) round control button (for adjusting a radio, TV, etc) （收音机、电视机等的）旋钮.
2 round lump on the surface of sth, eg a tree trunk 结节, 瘤, 疙瘩（如树干上的）.
3 small lump (of butter, coal, etc) （黄油、煤等的）小块.
4 (idm 习语) with knobs on (Brit sl 俚) (used to indicate the return of an insult, or emphatic agreement 用以表示反唇相讥或强调同意)
*`You're a selfish pig!' `And the same to you, with knobs on!' ｀自私鬼!＇｀你才是呢, 你是双料的!＇

n[C]
[Date: 1300-1400; Language: Middle Low German;Origin: knobbe]
a round handle or thing that you turn to open a door, turn on a television etc
　He thought the door was locked, but he turned the knob and the door opened.
　a brass door knob
　I adjusted the volume knob and sat down.
a knob of sth
a small piece of something
= lump
　Melt a knob of butter in the pan.
BrE spoken not polite a penis
with (brass) knobs on
BrE spoken old-fashioned used especially by children to reply to an insult
　'You're fat and lazy.' 'Fat and lazy to you with brass knobs on!'