A Hippocockasaurus is a term used to describe an obese to enormously fat girl who wildly and disgustingly tries to have sex with any guy.
It can also be used to describe a really fat girl who is ugly and would have sex with any guy.
A Hippocockasaraus tends to reside in nightclubs wearing very tight clothes and have beast like traits and manners.
Guy to friend: Did you get a look at that Hippocockasaurus
Describing girl: she was ugly
, like a Hippocockasaurus