Top definition
The act of epic failing so tremendously it can only be compared to one of the most ridiculously proportioned dinosaurs that ever existed.
Guy 1: I just lost in COD to an 11 year old, 30 to 4.

Guy 2: Failsaurus Rex dude...

___

Guy 1: A customer just asked me why they needed a power adapter for their laptop since it is wireless...

Guy 2: Wowwwww, failsaurus rex and a half...
by nightcrawler0188 April 06, 2010
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