petlja

1. loop; noose
   Napravi petlju i provuci konopac kroz nju. — Make a loop and pull the rope through it.
2. colloq. (imati petlju) guts; nerve
   Nije imao petlju da joj kaže istinu. — He didn't have the guts to tell her the truth.
   Kako imaš petlju da mi to kažeš? — How do you have the nerve to tell me that?
3. (of roads) interchange; junction
   Na petlji kod Autokomande je gužva. — There's a traffic jam at the Autokomanda interchange.
4. (in programming) loop
   Program je upao u beskonačnu petlju. — The program got stuck in an infinite loop.

In the sense "guts" it is almost always used as imati / nemati petlju.