zbiti

1. (zbiti se) to huddle together; to crowd together
   Deca su se zbila oko vatre da se ugreju. — The children huddled around the fire to keep warm.
   Putnici su se zbili u prvi vagon. — The passengers crowded into the first carriage.
2. (+ acc.) to compress; to pack down; to compact
   Zbij dobro zemlju oko sadnice. — Pack the soil down well around the seedling.
   Zbio je sve stvari u jedan kofer. — He crammed all his things into one suitcase.
3. (zbiti šalu) to crack a joke
   Zbio je šalu i svi su se nasmejali. — He cracked a joke and everyone laughed.
4. formal (zbiti se) to happen; to occur
   Niko ne zna šta se zbilo te noći. — No one knows what happened that night.

The participle "zbijen" (dense, compact) is very common: zbijen tekst, zbijeni redovi.