- A dance form originating in the 1980s, involving repeated quick jerking movements of the chest and arms, performed to house music.
- The act or method of using the jack; use of the jack in hunting or fishing: <em>as</em>, <em>jacking</em> for eels. See <internalXref urlencoded="jack">jack</internalXref>, <em>n.</em>, 11 .
- An extra draft given to the roving (in spinning fine cotton yarn on the mule) near the end of the outward traverse of the spindle-carriage.
- Present participle of <xref>jack</xref>.