Really off your head on alcohol or (esp.) drugs

To cause pain or, for one to be in pain

To do (something) recklessly and at speed

tr.v. caned, can·ing, canes

to hurt

A common congratulatory statement amongst cool Doctors. It is the zenith of synonyms for "smashed it", "well done", "congrats".

On social events, this statement can be amended slightly to get down with the "young" dyslexic crowd by adding the word "you did" before "caned it

Go fast. Hurry. Probably a reference to using a cane on a horse to make it go giddyup.