Bubbline en · PROPN
Etymology
Blend of bubblegum + Marceline.
Meanings
-
(slang) The ship of characters Princess Bubblegum and Marceline of the animated television series Adventure Time.
I don't think there was a singular emotion to describe the moment Bubbline became canon.
2018, Stephanie Chang, "When 'Bubbline' Became Canon", Her Culture, October/November 2018, page 69Still, intrigued by Bubbline, I'd occasionally check in on the fandom to see what was up with their relationship.
2018, Jordan Currie, "Canon, at last!", New Wave Magazine (Ryerson University), Fall 2018, page 10"The fanfiction actually began to seep into the show. The 'Bubbline' relationship between Marceline and Princess Bubblegum was never intended, but because it was a fan favourite, they're focusing on it a little bit. […]
2015, Jessica DiCicco, quoted in Kyle Butcher, "Supa DiCicco", Blank Gold Coast, April 2015, page 46