Wishing someone happiness two times - one for the present and the other for later on. Often given as a greeting or farewell by holding up two fingers and smiling.
She held up two fingers and smiled as she passed me, wishing me double happiness.
by ambermagic August 20, 2011
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1. A large firework, about the same diameter as a king-size cigarrette and two-thirds the length. Used in Austarlia and New Zealand for the same purposes as a Cherry Bomb, e.g., toilet cistern mayhem.

2. A form of mutual masturbation; The male lies on his back and performs as for a normal "handjob', while his female partner straddles his thighs and moves herself into such a position so as to stimulate her clitoris upon his moving hand. ( Caution: While a safer sex practice care must be taken to assure no fluid from the male lands on the vagina.).
1."Someone stuffed a double happy in MUzza's exaust pipe - Tore a hole in the muffler!"

2."We ran out of condoms, so we had a double happy instead."
by d f stuckey February 17, 2004
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