In the Original Series, the fumarello is a fairly large cigar, similar to a parejo. Typically seen near or in Starbuck's mouth, much to the dismay of the Cylons and their chest armor.
Starbuck using a nearby Centurion to strike a match (TOS: "Lost Planet of the Gods, Part II").
Ale | Ambrosa | Fumarello | Grog | Homemade Buzzer | Isoldin | Plant Vapors | Vignon
Medical: Antibiotics | Anti-radiation medication | Bittamucin | Bloodstopper | Burdock root | Chamalla | Doloxan | Interrogation drug | Morpha | Serisone | Sleeping pills | Stims | Vinagro
Recreational: Ambrosia | Coto | Fumarella leaf (Caprican Imperial, Foliole, Sarcoma) | Hawryliw | Leonis Red | Lethe | Leonis Estates Sparkling Wine | New Caprican leaf | Opium | Tigh's liquor | Virgon Brew
Original Series definition: a small cigar that Starbuck typically smokes (see: fumarello)