žvaka

1. colloq. chewing gum; gum
   Imaš li jednu žvaku? — Have you got a piece of gum?
   Neko je zalepio žvaku ispod stola. — Someone stuck gum under the table.
2. colloq. (about a story, excuse) a line; a story; empty talk
   To je stara žvaka, ne verujem mu više. — That's an old line, I don't believe him anymore.
   Ta žvaka kod mene više ne prolazi. — That line doesn't work on me anymore.

The neutral term is žvakaća guma.