Groundhog Effect 

When a penis becomes so timid or cold it climbs back into the body and hides, forming a temporary vagina.

This one time I went to a party where I didn't know anyone and my penis did the groundhog effect.

I was about to have sex with someone when I got a little nervous and my penis did the groundhog effect, so we just scissored and used a double sided dildo.

Groundhog Effect by pumpkinslicer2000 March 14, 2015

Groundhog Day Effect 

Based on the movie "Groundhog Day" starring Bill Murray. It is the idea that every action that one makes; the rewards and consequences of those actions are not followed through the next day. If someone were to make a big choice, commit a crime, offend someone, make a mistake, or meet someone through out a period of a regular 24 hr. day, those rewards and consequences for all of those actions are not carried through the next day. It is all forgotten. In other words, it's like yesterday never happened. Therefore this pattern can keep on repeating for an unknown amount of time.

Last night, Larry inadvertently said an offensive racial comment that offended many people. However, the very next day Larry experenced a Groundhog Day Effect. All was forgotten and everyone he offended seemed to have forgotten the incident. Therefore, Larry is in the same position as he was before he made the comment.

Groundhog Day Effect by AJHM January 11, 2008