The sexual act of climaxing in which two people are role playing, one as an ostrich and one as an egg. Typical in the North Country of New York, this act involves the male (or more masculine partner) to sit on the female (or more feminine partner) just as an ostrich would sit on an egg. When the female climaxes, this is considered the "hatching" of the egg.
OMG, I'm hatching so hard right now!
You be the ostrich, I'll be the egg. Now sit on me, I want to hatch!