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a bagash or back-gash is basically a bum.an anus a gash in your back if you will. (back +gash (speed up) = bagash mayt!)
the bagash can be used in conjuction with the 'bock' a penis which erects downward or is in the place of the anus to recreate 'bex' backward sex
(wedgie) aaaaargh! me bagash!
by Kai Jones February 18, 2008
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