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8.
1) The Universe's equal and opposite reaction to Jack Black, in accordance with Newton's Laws of Motion.

2) New British slang meaning "to defecate".
1) Actual A Level Physics question from Specimen Paper:
"Name a particle-anti-particle pair?"
Accepted answers:
Positron and electron
Muon and anti-muon
Jack Black and Jack White

2) "Outta my way, I need a Jack White!"
by Bailey89 May 02, 2006
 
9.
cockney rhyming slang for shite.
"Man ! those white stripes are a fucking joke. Total jack white."
by Drewbud315 July 06, 2007