Krayzie Bone -- I'm Selling Munchies ... I'll Make Lots of Monies

Krayzie Bone may have concocted the smartest business plan of all time -- sell munchies to stoners WHILE THEY BUY WEED.

The Bone Thugs-n-Harmony rapper says a fan gifted him a personalized vending machine ... and it inspired him.

Krayzie says he's in talks to put the machines in a few L.A. stores -- including weed dispensaries.

He's really serious about it. He's already ordered more vending machines for the launch.

Of course the machines will be filled with stoner favorites -- Funyuns, Pop Tarts, Twinkies.