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The hybrid-being who in essence represents absolute, complete, and undying hilarity. In physical shape, it can be described only as a gelatinous monstrosity wielding not the physical construct that is a body, but rather the characteristics of a cross-breed between the exclamation of 'rofl' and a dinosaur.

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During yesterday's regular observation of surroundings, I endeavoured to proceed to terraform the landscape that is my property's front lawn... but lo! A roflsaurus interrupted my labours and struck hilarity into my heart and soul!
by Theodorus March 28, 2004
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1. Lit. saurian considered emblematic of comedy, esp. puns and internet based humor. The common roflsaurus is known only to legend but is believed to average a meter and a half in height and to consume banned quotes off bash.org. Their mating calls are said to sound like, "Roofle roofle" ergo the name roflsaurus.

2. Denigratory term for a Forensics speech delivery posture. The roflsaurus involves placing a brief on a table and then leaning over it for a delivery punctured by gestures made with clawlike hands.
Bckgrd. One internet savvy coach got annoyed and called a speech-giver "roflsaurus" referencing both his nickname and his position.
The San Jose zoo recently acquired a roflsaurus that was captured on slashdot.

Ray, stop doing the roflsaurus or I'll make you do another Congress brief.
by Thelonius May 24, 2004
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