词典释义：
a rounded lump or ball, especially at the end or on the surface of something
圆球形突出物；疖。
a handle on a door or drawer shaped like a ball
球形门把手。
a rounded button for adjusting or controlling a machine
旋钮，调节器。
a small lump of a substance
小块
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add a knob of butter or margarine .加一小块黄油或人造黄油。
〈主北美〉 圆形小山。
〈粗 俚〉 a man's penis 男子阴茎。
〈英，粗俚〉 （男人）与…性交。
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with （brass） knobs on Brit .informal and something more 〈英，非正式〉 甚至更为…的，而且还不止于此的，在更大程度上的，比…还要更进一步的it is the rock ‘n' roll statement with knobs on . 这是那种比摇滚乐还要更进一步的言论 -
used for returning and strengthening an insult ［用于反唇相讥或加强辱骂语气］还是
‘Lazy tyke!’ ‘Lazy yourself with brass knobs on!’ “懒小子！”“你自己懒得快要生蛆了！” ［ORIGIN with allusion to the addition of decorative knobs to an object as an embellishment．］
"late Middle English： from Middle Low German
