Short for Cigarello.
A small type of cigar, that is
cut open, emptied of tobacco, and filled with
marijuana.
Also can be reffered to as the amount of
weed you get in a sack, saying, "Thats a rello" meaning it is enough to roll a cigarello
Dude, that rello we smoked earlier burned so niceand
slow.
Dude, that dime bag is enough for a couple of rellos