Mayweather Fight -- HISTORIC WEEKEND FOR HOS ... Says Bishop Don Juan

The weekend of the Mayweather vs. Pacquiao fight will be LEGENDARY for pimps, hos, marks, mark ass marks, trick ass marks, punk bitches and skip skap scallywags alike.

At least according to one of the most famous (and perhaps the most celebrated) pimp of all time ... Bishop Don "Magic" Juan.

The Bishop was hangin' at Berri's Cafe on Third in L.A. when he told us Sin City will be a virtual ho-asis on May 2nd ... because hos go where the money is.

"People are bringing hundreds of thousands [of dollars] just to throw away," Bishop says.