nabacivati

1. colloq. (nabacivati se + dat.) to hit on; to flirt with
   Stalno mi se nabacuje na poslu. — He keeps hitting on me at work.
   Nemoj da se nabacuješ svakoj devojci u klubu. — Don't hit on every girl in the club.
2. colloq. (of weight) to put on weight
   Zimi uvek nabacujem po nekoliko kila. — I always put on a few kilos in winter.
3. to throw on; to pile on; to toss out
   Radnici nabacuju pesak na kamion. — The workers are shoveling sand onto the truck.
   Na sastanku smo samo nabacivali ideje. — At the meeting we were just tossing out ideas.

In the flirting sense it is used with se and the dative: nabacivati se nekome.