Translation of "joj" into English

Prijateljica mi je bila šokirana kad sam joj rekla.

My friend was shocked when I told her.

Jest, to je već odradila.

oh, yes, she has already done that bit.

Bilo je skoro kao da smo zakucali koš na samom kraju.

It was almost as if we caught the tail end of an alley-oop.

Joj, tamo je Iron Fist u tom baršunastom rukavicom.

Ouch, there was an iron fist in that velvet glove.