"It's like a creature out of Greek mythology. She was like part woman, part horrible beast."
While Gillian is a beautiful woman, she has one tragic flaw: large meaty hands totally lacking in femininity. In other words: she has man-hands. Jerry tries to make the relationship with Gillian work, but cannot get over her hefty hands. He would even prefer Gillian have cool hook-hands or no hands at all over the hands she was born with.
Gillian is incredibly strong for a woman, probably because of her man-hands, and injured Jerry's wrist when she abruptly stopped him from rifling through her purse.