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

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