Pan-Galactic Gargle-Blaster

The Pan-Galactic Gargle-Blaster was a beverage served by Milo on the Rosette of Sirius. The Twelfth Doctor drank one to help cure a sore throat. He was reluctant to accept a second one because he "had a TARDIS to drive" and did not know where he would end up, but then said it would be rude to let it go to waste. (COMIC: Clara Oswald and the School of Death)

The Twelfth Doctor also mentioned Pan-Galactic Gargoyle-Blasters after meeting some "garrulous gargoyles". (COMIC: Terror of the Cabinet Noir)

Behind the scenes
The Pan Galactic Gargle Blaster (formatted without hyphens) was an alcoholic drink in Douglas Adams's The Hitchhiker's Guide to the Galaxy series.