How often should i wash my thick hair (im a guy)?

my hair is so thick and im a guy. i been washing it everyday with shampoo and conditioner and its getting long and it just poofs up like a jew fro even though im italian. i can't stand it and someone told me i shoulndt put shampoo in it every day just conditioner, is this a good idea? how else can i make my hair not poof up without getting it cut ? thanks!