A girl that is very passive/boring in bed. Mainly in missionary position.

Spread out like a starfish. No talent at all.

Starfish(n) the anus, or rectum. Also an adj.

A girl that has no talent or technique for sex. That is, she just lays there spreed out dead in the water, like a starfish.

Noun: A dead fuck. Someone who may lays there, doing nothing, during sex.

When you get so high you are spread out and stuck to your bed like a starfish.

It's a freaking "A marine echinoderm with five or more radiating arms. The undersides of the arms bear tube feet for locomotion and, in predatory species, for opening the shells of mollusks." Not anything to do with frickin $*x!!! Or, it's something from Charlie the Unicorn that loves Charlie, and eventually gives him a wish and burns almost to death!!!