Top Definition
Basically someone crazy. Kind of a synonym of "freak", but there is no humor in calling someone a freak, so if you want humor, call them a freakasaurus.
Freakasaurus was also mentioned in episode 15, season 2, of Star Trek: Voyager.
Has anyone ever told you you're a real freakasaurus?
by eners49 January 25, 2017

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some one who is very un intellegent and is related to a dinosaur
shut up u freakasaurus!!!!
by Amba lee May 11, 2003

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n. an attractive female that is known to dress in a sexy manner and reference or perform kinky activities. Also common to exhibit flirtatious behavior towards the opposite sex and in some cases the same sex. Age is deceptive and may appear younger than actual age.

a/k/a Freakasaurus Rex
1. I was amazed by the freakasaurus I saw wearing vinyl boots standing in line for the club in Vegas.

2. After five shots of tequila Katie started making out with her best friend. What a freakasaurus!
by Uncle Jimmy 69 August 29, 2006

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