a grumpy person. may or may express said grumpiness with non-human like grunts and sounds. definitely pouty and brooding.
An unexpected snowstorm in April turned Graham from a happy, human boy into a decidedly brooding grumpasaurus.
by Siducci April 17, 2007
A dinosaur that is exceptionally grumpy, this term can be used to describe a woman when she is grumpy especially if she also looks like a dinosaur
guy#1- omg susie was in such a mood today.
guy#2- yeh and she is so fucking ugly
guy#1- what a grumpasaurus
guy#2- yeh and she is so fucking ugly
guy#1- what a grumpasaurus
by gapppo June 8, 2010
by tc61 April 23, 2011
Person 1: "What's wrong with Bill today?"
Person 2: " He lost his wallet this morning and all afternoon he was nothing but a Grumpasaurus Rex to everyone in accounting."
Person 2: " He lost his wallet this morning and all afternoon he was nothing but a Grumpasaurus Rex to everyone in accounting."
by bmyoung November 26, 2013