shrink dick 

The shrinking of the penis from its normal flaccid size, most commonly due to cold weather or stimulant drug use.

"my boyfriend did so much speed last night that he had a serious case of shrink dick, it was like half the size it usually is"

"its so cold out here that i know for sure i'll have a serious case of shrink dick"

shrink dick by OGspeedymcgee July 21, 2016

Shrinky dick

A penis that is a fairly good size when erect, but embarrassingly small when not.

I dont like to wear speedos because I have a shrinky dick.

Shrinky dick by Jake1210 November 10, 2007

loose lips shrink dicks 

1. an expression implying that knowing to much about an activity, situation or person tends to discourage one from involving himself with it, often related to sexual encounters

see also zipless fuck

2. a truism

3. a parody of loose lips sink ships

After Elliott told Devin that Kittyboot's friend from Philly had roast beef curtains, Devin replied, "Buddy, thanks for warning me... loose lips shrink dicks."

loose lips shrink dicks by Elliott July 18, 2005

Shrinky dick

Shrinky dick is a term used mostly by women to embarras men for having a small penis.

Guy: "Hey gurl!"

Girl: "Hey shrinky dick."

Shrinky dick by The Whitest White Man Ever September 24, 2016