Top definition
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"
by OGspeedymcgee July 21, 2016
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