grebati

1. to scratch
   Mačka stalno grebe vrata kad hoće napolje. — The cat keeps scratching the door when it wants to go out.
   Nemoj da grebeš sto nožem! — Don't scratch the table with the knife!
2. to scrape
   Svako jutro grebem led sa stakla automobila. — Every morning I scrape the ice off the car windscreen.
3. (of the throat) to feel scratchy
   Od jutros me grebe grlo. — My throat has been scratchy since this morning.
4. colloq. (grebati se) to scratch oneself
   Dete se grebe jer ga je ujeo komarac. — The child keeps scratching because a mosquito bit him.
5. colloq. derog. (grebati se; at others' expense) to freeload; to mooch
   Stalno se grebe za cigarete, nikad ne kupi svoje. — He's always bumming cigarettes, he never buys his own.
   Nemoj da se grebeš na tuđ račun. — Don't freeload at other people's expense.

The perfective is ogrebati (to scratch); "grebe me grlo" means my throat feels scratchy.