You smoke some really good dro and go to bed pretty high. The next day you feel all hazy, fuzzy and unfocused. That's a haze-over!
"Bro, I can't do any work today...Kathy brought over some super tasty sour D. We crashed soon after getting super effed."
"Wowzers, I wish I had a haze-over! I have a lot of boring stuff to do today...be nice to just zone out."