n.

1. 医用海绵；纱布
2. 药签；拭子
3. 拖把
4. 无赖

vt.

1. 打扫；擦拭
2. 涂抹（药）于

n.

1. an absorbent pad used in surgery and medicine for cleaning wounds or applying medication.
   ▸a specimen of a secretion taken with a swab.
2. a mop or other absorbent device for cleaning or mopping up.
3. archaic a contemptible person.
   ▸US another term for swabbie.

v.