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Just like the Boston Shot glass: where a bloke jizz's into two shot glasses and one is inserted in her vagina and the other shot glass is inserted into the arsehole of your partner.
G: Hey Bakes, I gave your grand mother a double boston shot glass.

B: Really?

G: Yeah! I didn't know she could say cheers.
by Fidy Quid August 07, 2010
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