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4.
a type of space cadet, usually Canadian that always daydreams and spazzes profusely; more formally known as sydney, but not the city in australia.
"she so pulled a kidney yesterday."
by pagina noelle May 19, 2008
 
1.
a younger version of Adult knees
the little bastard kept falling on his kidneys.
by willy b quick October 26, 2003
 
2.
Slang word from London used to describe something good or great. Similar effect to 'sick' or 'boss'
Mate, that was such a kidney night

This is track is so kidney
by Keith240 March 11, 2013
 
3.
tha brain, intelligence
yo man, that nigga got a hell lotta kidneys.
by time123 December 26, 2007