Hi dear, it means Brother , or Bro !!!

If it's written this way: " daadash " it can be understood in two ways: 1. دادش: his or her scream 2. دادش: he/she gave it ---> this is a very formal and classic type of it's pronunciation. if it's this way: " dadash " or " daadaash " it would mean " Bro " non-formal way to call a brother

Which one do you mean , "daadash" (دادش) or "daadaash"(داداش) ?

oh daadash?????????/// he eh ok daadash means his or her shout

dadash means brother but its informal an example:dadasham dars mikhoneh