frightened turtle 

When you're so cold, that your penis tries to suck back into your body like a frightened turtle into it's shell.

"Dude, you should know better than to go skinny-dipping on the first date. You never show the frightened turtle to a chick who hasn't already seen your meat."

frightened turtle by Mr. BRW February 7, 2008

Frightened Turtle 

When a poop log rears it's brown head out for a peek, only to retreat to it's rightful home at the moment, the ass.

Man! I almost messed my trousers, thankfully it was only a frightened turtle, so no soilage! *high five*

Frightened Turtle by Scooter McFadden April 19, 2004

Frightened Turtle Effect 

Another term for shrinkage. When the male genetalia becomes withered from immersion in a cold fluid.

Dude this water is frezzing
I know i've got the frightened turtle effect over here.

Frightened Turtle Effect by Blaker April 27, 2006

Frighten turtle syndrome 

The act of the male penis retreating back into the pelvis area causing it to look like the head a Frighten turtle Also known as FTS

That water was damn cold I now have Frighten turtle syndrome (FTS)

Frighten turtle syndrome by Wooha5062 April 26, 2010