ticking

Short definition from Wiktionary

Noun

1. 1
   A strong cotton or linen fabric used to cover pillows and mattresses.
2. 2
   A sound of something ticking. (For example, the second hand on a clock face.)
3. 3
   An illusional style of dance where one moves his or her body to the "tic" of the music creating a strobe or animated effect.
4. 4
   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.

Verb

1. 1
   present participle and gerund of tick