stideti se

1. (stideti se + gen.) to be ashamed
   Stidim se onoga što sam juče rekao. — I'm ashamed of what I said yesterday.
   Stidi se, to nije lepo! — Shame on you, that's not nice!
2. (stideti se) to be shy; to feel embarrassed
   Ne stidi se, uzmi još jedno parče. — Don't be shy, have another piece.
   Mali se stidi pred nepoznatim ljudima. — The little one is shy around strangers.

In both meanings the verb is used only with se: stideti se; what one is ashamed of goes in the genitive: stidi se svog ponašanja.