zezati

1. colloq. (+ acc.) to tease; to make fun of
   Drugari ga stalno zezaju zbog frizure. — His friends keep teasing him about his haircut.
   Zezaš me, zar ne? — You're pulling my leg, right?
2. colloq. (zezati se) to joke around; to kid
   Ne ljuti se, samo se zezam. — Don't be mad, I'm just kidding.
   Celo veče smo se zezali i smejali. — We fooled around and laughed all evening.
3. colloq. (of a thing, health) to give trouble; to act up
   Auto me opet zeza, ne pali ujutru. — The car is acting up again, it won't start in the morning.
   Već nedelju dana me zeza koleno. — My knee has been bothering me for a week.

In the sense "to joke around" it is used with se: zezati se.