what makes tick

what makes (one) tick

The things that motivate one or make one behave in a certain way. I'd love to sit you down for an interview so I can find out what makes you tick. Janet is a very private person, so it's hard to know what makes her tick.
See also: make, tick, what
Farlex Dictionary of Idioms.

what makes someone tick

Fig. something that motivates someone; something that makes someone behave in a certain way. (Fig. on what makes something tick.) William is sort of strange. I don't know what makes him tick. When you get to know people, you find out what makes them tick.
See also: make, tick, what

what makes something tick

Fig. the sense or mechanism that makes something run or function. (With reference to the ticking of a clock representing the functioning of the clock.) I don't know what makes it tick. I took apart the radio to find out what made it tick.
See also: make, tick, what
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • drive (one) out of office
  • force (one) out of office
  • force out of office
  • give (one) (one's) head
  • give head
  • give somebody their head
  • give someone their head
  • cooking for one
  • 1FTR
  • all's one to (one)