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Exclamation of approval or happiness. Lifted from the french kid on 90's UK children's TV programme, 'Tots TV'.
Bloke, upon finding £5 on the floor: "A fiver! Sac magique!"
by knutcracker March 23, 2007
Manchester, England, term for scrotum.

"sac magique"
by Anneure October 05, 2011