Bespin port was a type of drink that contained alcohol. After drinking it, Jai Cirri suffered from a hangover and stayed in his living space located in Cloud City.
The alcoholic beverage Bespin port was first introduced in the Star Wars Legends roleplaying game supplement Galaxy Guide 9: Fragments from the Rim, which was released in 1993. Within the Legends storyline, the word "Port" is capitalized.