v. the act of being so obliterated that you resort to throwing up in the closest drainage system. in this case a sink. "shink" comes from the drunk pronunciation of sink.
I was so wasted at the frat party that I had some major shinkage later that night.
What happens to a man's penis in cold water. Often a result of cold showers, swimming pools, or the ocean. Very embarrassing.
Man, that pool could make a porn star look like a 9 year old.
Damn my girlfriend dumped me when she saw me get out of the shower -- apparently she doesn't understand that shrinkage really CAN make a penis 1 inch long.
The act of having your wang shrunken to the size of a single testicle while playing water polo in two speedos.
After the three consecutive games in the championship, jonnyboy experienced epic shrinkage so great that he was too embarrassed to even get out of the pool.