Nesting is a ritual performed by pregnant women in ridding the house, the "nest", from anything potentially harmful to the soon to be born child.
This can also be seen as a phase before menstruation where the woman enjoys cuddling and snuggling more than usual.
Barbera: I think Darcy is pregnant.
Heather: Why do youthink that?
Barbera: Because shes nesting.
A nestingcreature is usually a person who creates a home for themselves, usually in their room. Often this is down by retreating to their room, away from social situations whereby they eat all of their meals and watch reality tv in their room, or their "nest".
James has become a nesting creature. With multiple pizza boxes on the floor and his reality tv on his laptop, his nest is in strong development.
The process of creating a nest of the floor of the bathroom out of towels and blankets. This is usually done because someone is too drunk or otherwise sick and is constantly throwing up.