Lumpy Space Princess debuted in Adventure Time, which ran on Cartoon Network from 2010 to 2018, and quickly became a fan favourite for her lumpy slang. Voiced by series creator Pendleton Ward, she replaces normal swearing with lump, so lump off is her rude dismissal of choice. Clips of her family arguments spread as reaction sounds on soundboards and in edits, in the same spirit as a blunt shut up mom line, because her spoiled delivery makes even a telling off feel playful rather than genuinely mean.