A euphemism, to "sink the kayak" is to ejaculate during intercourse.

When a guy inserts his balls (testicles) into a girls anal cavity.

Verb. Learning from the things that drag you down in life and swallow you up. Sinking well is turning your pain into something productive whether practical or creative and abstract. When you feel like complete crap and scrawl out a poem, that is sinking well.

No one can tell you what a sink whistle is

Shaving sinks is a future term or slang name for the soldiers all over the world, who are suffering from war stress disorder also known as scooting around in the skatepark, or flatearth scientists, you know.

Used to show that one is very surprised about something.