When a user submits a new word and definition to Urban Dictionary and the volunteer editors who happen to review the submission lack intelligence, understanding and/or a sense of humour therefore end up prematurely rejecting spectacularly humorous submissions.
Editor - "A few volunteer editors read your definition and decided to not publish it. Don't take it personally"

Disappointed user - "Damn it, premature Rejectulation again!"
by manicbubble February 10, 2015
Get the Premature Rejectulation mug.