&lt;strong&gt;JACK&lt;/strong&gt;&lt;]<br />
<br />
-  a device for lifting a heavy object<br />
<br />
- a playing card displayin a knave<br />
<br />
- a sailor<br />
<br />
- to increase the level of - to jack up<br />
<br />
- a childs game - jack(s)<br />
<br />
- nothing - as in you don&#39;t know jack<br />
<br />
- an electrical device used to receive a plug