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2.
that which is utterly ridiculous, exaggerated, or nonsensical.
"Maaan that shiiit was cretaceous!"
"yo hubert, that's totally cretaceous!!
by Feke September 05, 2007
 
1.
1. An ancient creature or person which should have been long dead.
2. A boring situation which one should have stopped persueing hours ago
"Maaan, these waves are Cretaceous dude. We should split and catch outselves a fresh pie"
by Kigs December 06, 2006
 
3.
something or someone that is too cool for any other word; alternative to saying "cool" because it is over-used
That new Franz Ferdinand album is cretaceous , man.
by Capital V December 17, 2005