chicken hatch 

The act of poking the head of a flaccid penis down into the skin around it and while holding that position, grabbing the skin of the scrotum and pulling it up over the spring-loaded tucked penis head. The finished product will look like a shiny egg-of-skin. (if hairless) Then, when you let go... yell “Bwak Bwak, Chicken Hatch!” And watch the penis slowly spring forth from its “egg” as if being hatched.

We used to do this as pre-pubescent children! Loads of fun! hahaha
This may only work for "growers" , not "show-ers"

chicken hatch

chicken hatch by Hatchman April 26, 2014

don't count your chickens before they hatch 

You should not assume that what you think will happen, will eventually happen. It's mostly used in cases where you would brag, plan, or make other deals before the event actually occurred. Originates from selling chickens based on how many eggs there is before you know how many eggs are viable. A few chickens may die, some may not hatch, and others eggs may break. Example: quitting your job or buying expensive items when your $1,000,000 sports bet looks likely but there's still two minutes more left in the game.

Hey Bob, you have to keep on playing hard. Even though we are up five goals with 5 minutes left, they can still come back. Don't count your chickens before they hatch.

don't count your chickens before they hatch by Crackle Dackle December 13, 2016

Counting chickens before they hatch 

When you call something yours before you have it

The hillary voters were counting chickens before they hatch

Counting chickens before they hatch by 300WinMag March 17, 2017

count your chickens before the egg hatched 

Count your chickens before the egg hatched.

I finally planted 5 fruit trees. Do you want to buy some fruit this summer?
Count your chickens before the egg hatched. - eg taking something for granted before it happens

count your chickens before the egg hatched by Fursu May 2, 2016