stotinjak

1. about a hundred; a hundred or so
   Na koncertu je bilo stotinjak ljudi. — There were about a hundred people at the concert.
   Do sela ima još stotinjak kilometara. — It's another hundred kilometres or so to the village.

It is usually followed by the genitive plural (genitive singular with collective nouns: stotinjak dece), and the verb is usually neuter singular: došlo je stotinjak ljudi.