What is the meaning of Ticking?

A strong cotton or linen fabric used to cover pillows and mattresses.

A sound of something ticking.

An illusional style of dance where one moves his or her body to the "tic" of the music creating a strobe or animated effect.

present participle and gerund of tick

A marking that occurs on some horses, involving white flecks of hair at the flank, and white hairs at the base of the tail, called a skunk tail or rabicano, sometimes referred to as birdcatcher ticks.

Source: wiktionary.org