Top definition
A Sergeesaurus is the nerdy dinosaur on Land Before Time.
Sergeesaurus - a blue longneck dinosaur with an obession with Dianasaures and telescopes.
If your friend is being nerdy ;
Dude 1 *studying for 5 exams*
Dude 2 yoo dude , your such a Sergeesaurus
by msspurrrfect September 25, 2011
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