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noun. male or female who is a monster at dating, whether it be the same or opposite sex. They go on dates frequently with many different people. Aforementioned dates are not aware at the time of what a handful said "dateosaurus rex" can be. Usually once the date is initiated, it is too late.
Bob: What are you up to tonight man?
Adam: I got a date with that new girl, Reese.
Bob: Jesus man! You're like always out on dates!
Adam: Naw....
Bob: No man, you are totally a DATEOSAURUS REX. They have no idea what they're in for. Do they?
Adam: Usually not man, usually not.
by Ressaler August 17, 2008
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Jun 14 Word of the Day
Referring to women who are sexually or romantically attracted to other women. Applies to both lesbians and bisexual women, as it is only the same-sex attraction that matters, not any other attractions the women may have.

Originates from the Greek poet Sappho, a bisexual woman from the Isle of Lesbos, from which we get the term lesbian.
The sapphic women greatly enjoyed each others company.
by whatisdead June 25, 2015
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2
noun. male or female who is a monster at dating, whether it be the same or opposite sex. They go on dates frequently with many different people. Aforementioned dates are not aware at the time of what a handful said "dateosaurus rex" can be. Usually once the date is initiated, it is too late.
Bob: What are you up to tonight man?
Adam: I got a date with that new girl, Reese.
Bob: Jesus man! You're like always out on dates!
Adam: Naw....
Bob: No man, you are totally a DATEOSAURUS REX. They have no idea what they're in for. Do they?
Adam: Usually not man, usually not.
by ressaler August 17, 2008
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