shrinkage

noun

1. (countable, uncountable)The act of shrinking, or the proportion by which something shrinks.

   “How far progress has been made in liquidating the locomotive stock of the old companies may be judged from the shrinkage in their numbers, by some 50 per cent. at the end of 1931, to about 35 per cent. in 1938.”

   “An emergency South Western Railway (SWR) timetable came into force on September 5, in response to the shrinkage of clay embankments on the nine miles between Gillingham and Tisbury. The shrinkage has been caused by the driest summer since 1936, with a severe 40mph speed restriction having to be imposed.”

2. (countable, uncountable)The act of shrinking, or the proportion by which something shrinks.
3. (countable, slang, uncountable)The act of shrinking, or the proportion by which something shrinks.

   “Do women know about shrinkage?”

   “This is why guys experience "shrinkage" after they've been swimming.”

   “That'll get their blood flowing. ... getting the blood flowing coz just the mere thought of jumping into that icy water was starting to get the shrinkage going.”

   “And of course, one of the most important questions of all, especially among male plungers, is, "What about shrinkage?!"”

   “Next, on with his favourite budgie smugglers. His sequined posing pouch. No winky shrinkage for him.”