When an individual is too intoxicated or tired to participate in intercourse with their partner they simply lay on their back outstretched to resemble the same shape as a starfish and let their partner do all the work.

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

Women that lay still, almost lifeless, with arms and legs spread during missionary sex.

Someone who is incompetent at the act of sex that they lie there like a star fish receiving it all but they never act upon it. No matter what their sexual orientation or gender. All they do is take, take, take. Oral, Anal but never give any, unless it will satisfy themself. They are usually premature and have small dicks, and have a lack of it...

Starfishing- The act of two people spreading their butt cheeks apart and touching and/or rubbing each other's assholes together.

Yes, it is a thing. Some people will state that this isn't possible. That only means that they have tried it.

The act of sprawling out in bed, taking up as much space as possible, immediately upon the departure of your significant other, fuck buddy, or one night stand.