The 'Disco 2000' singer declared to the 30,000-strong crowd at Ireland's Electric Picnic festival that the Britpop band may never return to another gig.
Before closing their 90-minute set with 'Common People', Cocker told his fans: "This may be the last time we're ever all on stage together again."
However, Cocker later teased: "Maybe our paths will cross again."
Classic hits 'Babies', 'Mis-Shapes' and 'Do You Remember The First Time?' were also among Pulp's set.
Reforming last November, the '90s hitmakers made a surprise return to Glastonbury this summer for the first time in 13 years, before playing Reading.
> Pulp storm second night at Brixton Academy
Watch Pulp playing 'Disco 2000' live on Later with Jools Holland in 1995 below: