Basically what would happen if Kirby had sex with Ditto.
Child 1: You catch the latest adventure time?
Child 2: Yeah! lumpy space princess was hilarious!
A really fat girlfriend that is often dated by men of small stature
Guy 1: Hey hows your new girlfriend?
Guy 2: My Lumpy Space Princess? Really good. I just had to calm her down the other night with breadsticks from Olive Garden.
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An obese person in clothing that wears clothes at least 2 sizes too small, shorthand LSP
That lady in a onesie is a Lumpy Space Princess! Stay away from her you’ll contract a case of the lumps