šrek

1. colloq. regional (of position of an object) aslant; askew
   Slika ti visi malo na šrek. — Your picture is hanging a bit crooked.
   Iseci hleb na šrek. — Slice the bread at an angle.

A German loan (schräg) heard mostly in Vojvodina; the form šreg is more common, usually in the phrase "na šreg" / "na šrek" ("staviti na šreg", "visi na šreg").